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0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

         p codes (P编码)
         p invariance (P不变性)
         p reactor (P堆)
         p states (P态)
         p waves (P波)
         p-branes
         p-n junctions (P-N结)
         p2-approximation (P2-近似)
         p3-approximation (P3-近似)
         paba (对氨基苯甲酸)
         pacemakers (起博器)
         pacific islands (太平洋群岛)
         pacific northwest laboratories (太平洋西北实验室)
         pacific ocean (太平洋)
         packaging (包装)
         packaging rules (包装规则)
         packed beds (填充床)
         packing (填密)
         packing column
         packings (填料)
         pade approximation (帕德近似)
         paec (菲律宾原子能委员会)
         pah (多环芳香烃)
         pahr (事故后热量导出)
         pain (疼痛)


         paintings (油画)
         paints (油漆)
         pair production (对产生)
         pairing energy (对能)
         pairing interactions (对相互作用)
         pakistan (巴基斯坦)
         palau (金钯合金)
         paleocene epoch (古新世)
         paleoclimatology (古气候学)
         paleogene period (早第三纪)
         paleomagnetism (古地磁学)
         paleontology (古生物学)
         paleotemperature (古温)
         paleozoic era (古生代)
         palladium (钯)
         palladium 103 (钯-103)
         palladium 98 (钯-98)
         palladium 99 (钯-99)
         palladium additions (钯添加物)
         palladium alloys (钯合金)
         palladium complexes (钯配合物)
         palladium compounds (钯化合物)
         palladium hydrides (氢化钯)
         palladium ions (钯离子)
         palladium sulfides (硫化钯)


         palm oil (棕榈油)
         palmitic acid (棕榈酸)
         palynology (孢粉学)
         panama (巴拿马)
         panama canal (巴拿马运河)
         panama canal zone (巴拿马运河地域)
         pancreas (胰腺)
         panels (盘区)
         pantothenic acid (泛酸)
         papain (木瓜蛋白酶)
         papaver somniferum (罂粟)
         papayas (番木瓜)
         paper (纸)
         paper chromatography (纸色谱法)
         paper industry (造纸工业)
         papp (对-氨基苯丙酮)
         paprika (红辣椒)
         papua (巴布亚)
         papua new guinea (巴布亚新几内亚)
         para-aminobenzoic acid (对氨基苯甲酸)
         parabiosis (联体)
         parabolas (抛物线)
         parabolic reflectors (抛物面反射器)
         parabolic trough collectors (槽形抛物面集热器)
         parachutes (降落伞)




         particle structure (粒子结构)
         particle tracks (粒子径迹)
         particle-beam weapons (粒子束武器)
         particle-core model (粒子-核心模型)
         particle-rotor model (粒子-转子模型)
         particles (粒子)
         particles fuel
         particulates (微粒)
         partition (分配设备)
         partition chromatography (分配色谱法)
         partition functions (配分函数)
         parton model (部分子模型)
         partons (部分子)
         parturition (分娩)
         pas (对氨基水杨酸)
         pascal (PASCAL语言)
         paschen law (帕邢定律)
         paschen-back effect (帕邢-巴克效应)
         passengers (旅客)
         passivation (钝化)
         passivity (钝态)
         pasteurization (巴氏灭菌法)
         pastures (牧草)
         patent laws (专利法)
         patents (专利)


         path integrals (路径积分)
         pathogenesis (发病机理)
         pathogens (病原体)
         pathological changes (病理改变)
         pathology (病理学)
         patients (病人)
         pattern recognition (模式识别)
         patterson method (帕特逊方法)
         pauli exclusion principle (泡利不相容原理)
         pauli matrices (泡利矩阵)
         pauli principle (泡利原理)
         pauli spin operators (泡利自旋算符)
         pavements (铺筑材料)
         payback period (资金回收期)
         pbfa (粒子束聚变加速器)
         pbi (蛋白结合碘)
         pca (极冠吸收)
         pcb (多氯联苯)
         pcr (聚合酶链反应)
         pdu (工艺发展装置)
         pe-16 (pe-16合金)
         pea plant (豌豆植物)
         peace river (皮斯河)
         peace river deposit (皮斯河矿床)
         peaches (桃子)


         peak load (峰值负荷)
         peak power (峰值功率)
         peak-load pricing (峰值负荷定价)
         peaks (峰)
         peanut oil (花生油)
         peanuts (花生)
         pearlite (珠光体)
         pears (梨子)
         peas (豌豆)
         peat (泥炭)
         peatlands (泥炭地)
         pecan trees (美洲山核桃树)
         pectins (果胶)
         peculiar a-stars (特殊a恒星)
         pediatrics (儿科学)
         peening (锤击)
         pegmatites (伟晶岩)
         pelargonic acid (壬酸)
         pellet injection (靶丸注入)
         pelletizing (芯块制造)
         pellets (靶丸)
         pellicularia (纤维素酶生菌)
         pelvis (骨盆)
         penalties (罚款)
         pendulums (钟摆)



         peptides (肽)
         peptone (胨)
         perchlorates (高氯酸盐)
         perchloric acid (高氯酸)
         perfect flow (完美流动)
         perforation (穿孔)
         performance (性能)
         performance testing (性能检验)
         perfused organs (灌注器官)
         perfused tissues (灌注组织)
         pericardium (心包)
         peridotites (橄榄岩)
         periodic acid (高碘酸)
         periodic functions (周期函数)
         periodic potentials (周期势)
         periodic system (周期系)
         periodicity (周期性)
         periosteum (骨膜)
         peripheral collisions (边缘碰撞)
         peripheral models (边缘模型)
         periphyton (水生附着生物)
         periscopes (潜望镜)
         peritoneum (腹膜)
         peritonitis (腹膜炎)
         perlite (珍珠岩)




         petroleum fractions (石油馏分)
         petroleum geology (石油地质学)
         petroleum industry (石油工业)
         petrology (岩石学)
         pett (正电子发射跨轴断层照相术)
         ph'chromosome (ph染色体)
         ph value (PH值)
         phages (噬菌体)
         phagocytes (吞噬细胞)
         phagocytosis (吞噬作用)
         phanerochaete (显毛)
         phantoms (体模)
         pharmacology (药理学)
         pharmacotherapy (药物疗法)
         pharynx (咽)
         phase change materials (相变材料)
         phase diagrams (相图)
         phase factor (相因子)
         phase oscillations (相振荡)
         phase rule (相律)
         phase shift (相移)
         phase space (相空间)
         phase stability (相稳定性)
         phase studies (相研究)
         phase transformations (相变)


         phase velocity (相速)
         phaseolus (菜豆属)
         phenacetin (非那西汀)
         phenanthrene (菲)
         phenanthrolines (菲咯啉)
         phenazine (吩嗪)
         phenolates (苯酚盐)
         phenols (酚)
         phenotype (表现型)
         phenyl methyl ether (苯甲醚)
         phenylacetylene (苯基乙炔)
         phenylalanine (苯丙氨酸)
         phenylamine (苯胺)
         phenylethylene (苯亚乙基)
         phenylisopropylamine (苯基异丙胺)
         philadelphia chromosome (费城染色体)
         philippine organizations (菲律宾机构)
         philippines (菲律宾)
         phlorhizin (根皮苷)
         phlorizin (根皮苷)
         phonons (声子)
         phorbol esters (佛波醇酯)
         phosgene (光气)
         phosphatases (磷酸酯酶类)
         phosphate glass (磷酸盐玻璃)



         phosphors (磷光体)
         phosphorus (磷)
         phosphorus 21 (磷-21)
         phosphorus 24 (磷-24)
         phosphorus 25 (磷-25)
         phosphorus 28 (磷-28)
         phosphorus 30 (磷-30)
         phosphorus 31 (磷-31)
         phosphorus 32 (磷-32)
         phosphorus 35 (磷-35)
         phosphorus 36 (磷-36)
         phosphorus 40 (磷-40)
         phosphorus 42 (磷-42)
         phosphorus 43 (磷-43)
         phosphorus additions (磷添加物)
         phosphorus complexes (磷配合物)
         phosphorus compounds (磷化合物)
         phosphorus hydrides (磷氢化合物)
         phosphorus ions (磷离子)
         phosphorus oxides (氧化磷)
         phosphorus sulfides (硫化磷)
         phosphorylases (磷酸化酶)
         phosphorylation (磷酸化)
         phosphotransferases (磷酸转移酶)
         phosphotungstic acid (磷钨酸)





         physical properties (物理性质)
         physical protection (实体保护)
         physical radiation effects (物理辐射效应)
         physical vapor deposition (物理蒸气淀积)
         physics (物理学)
         physiology (生理学)
         physostigmine (毒扁豆碱)
         phytic acid (肌醇六磷酸)
         phytochrome (光敏色素)
         phytochromes (植物光敏色素)
         phytohemagglutinin (植物血球凝集素)
         phytoplankton (浮游植物)
         picket fence (磁篱)
         pickling (酸洗)
         picolines (皮考啉)
         picolinic acid (皮考啉酸)
         picric acid (苦味酸)
         pierce electron guns (皮尔斯电子枪)
         pies (项目独立评价系统)
         piezoelectricity (压电)
         piezometry (压力测定法)
         pigeons (鸽)
         pigment cells (色素细胞)
         pigments (色素)
         pigs (猪)


         pikas (鼠兔)
         piles (桩)
         pilocarpine (毛果芸香碱)
         pilot plants (中间工厂)
         pimephales promelas (鲤科淡水小鱼)
         pinacol (频哪醇)
         pinch effect (箍缩效应)
         pineal gland (松果腺)
         pineapples (菠萝)
         pines (松树)
         pinning force (锁住力)
         pinnipeds (鳍足类)
         pion condensation (π介子凝聚)
         pions (π介子)
         pipe fittings (管配件)
         pipe joints (管接头)
         pipe whip (管道甩动)
         pipelines (管线)
         piperazines (哌嗪)
         piperidines (哌啶)
         pipes (管道)
         pistons (活塞)
         pisum (豌豆属)
         pitch angle (俯仰角)
         pitchblende (沥青铀矿)


         pitches (焦油沥青)
         pitot tubes (皮托管)
         pits (光致瞬态谱学)
         pitting corrosion (点蚀)
         pittsburgh (匹兹堡)
         pituitary gland (脑下垂体)
         pituitary hormones (垂体激素)
         pivalic acid (特戊酸)
         pixe analysis (粒子激发X射线发射分析)
         placenta (胎盘)
         placers (砂矿)
         plages (谱斑)
         plagioclase (斜长石)
         plagioclasite (斜长岩)
         plaice (鲽)
         planaria (涡虫)
         planck law (普朗克定律)
         plane-wave born approximation (平面波玻恩近似)
         planetary atmospheres (行星大气)
         planetary evolution (行星演化)
         planetary nebulae (行星状星云)
         planets (行星)
         plankton (浮游生物)
         planned communities (计划共同体)
         planning (计划编制)




         plasmids (质粒)
         plasmin (血纤维蛋白溶酶)
         plasminogen (纤维蛋白溶血酶原)
         plasmocytes (浆细胞)
         plasmodium (疟原虫属)
         plasmoids (等离子体团)
         plasmons (等离子体激元)
         plaster of paris (烧石膏)
         plastic foams (泡沫塑料)
         plastic properties (可塑性)
         plastic scintillators (塑料闪烁体)
         plastic surgery (成形外科学)
         plasticity (塑性)
         plasticizers (增塑剂)
         plastics (塑料)
         plastics industry (塑料工业)
         plastoquinone (质体醌)
         plate tectonics (板块构造学)
         plates (板)
         plates fuel
         plating (镀)
         plating solutions (电镀液)
         platinum (铂)
         platinum 200 (铂-200)
         platinum alloys (铂合金)


         platinum complexes (铂配合物)
         platinum compounds (铂化合物)
         platinum oxides (氧化铂)
         platyhelminths (扁形动物)
         pleistocene epoch (更新世)
         plesiotherapy (贴近疗法)
         pleura (胸膜)
         plexiglas (普莱克希耐热有机玻璃)
         pliocene epoch (上新世)
         ploidy (倍性)
         plotters (描绘仪)
         plows coal
         plugging (堵塞)
         plugging agents (封堵剂)
         plugs (塞子)
         plumbing (管道设备)
         plumes (羽团)
         plums (李子)
         plunger pumps (柱塞泵)
         pluronics (破乳剂)
         plutonic rocks (深成岩)
         plutonium (钚)
         plutonium dioxide (二氧化钚)
         plutonium hydrides (氢化钚)
         plutonium isotopes (钚同位素)


         plutonium oxides (氧化钚)
         plzt (钛锆酸镧铅)
         pmma (聚甲基丙烯酸甲酯)
         pna (多核芳香烃)
         pnc (动力堆与核燃料发展公司)
         pneumatic motors (气动马达)
         pneumatic transport (气动输送)
         pneumatics (气体力学)
         pneumococcus (肺炎球菌)
         pneumoconioses (尘肺)
         pneumonia (肺炎)
         pneumonitis (局限性肺炎)
         pnictides (磷族元素化物)
         pnl (太平洋西北实验室)
         po river (波河)
         pockels cell (波克尔斯盒)
         pocket calculators (袖珍计算器)
         podophyllic acid (鬼臼酸)
         pohang light source (浦项光源)
         poincare-bertrand formula (庞加莱-伯特兰公式)
         point charge (点电荷)
         point contacts (点接触)
         point defects (点缺陷)
         point kernels (点核)
         point mutations (点突变)


         point sources (点放射源)
         poiseuille flow (泊萧叶流)
         poisoning (中毒)
         poisson equation (泊松方程)
         poisson ratio (泊松比)
         poland (波兰)
         polar compounds (极性化合物)
         polar cusp (极尖区)
         polar regions (极区)
         polar solvents (极性溶剂)
         polar substorms (极地亚暴)
         polar-cap absorption (极冠吸收)
         polarimeters (偏振计)
         polarimetry (偏振测定法)
         polaritons (极化声子)
         polarizability (极化率)
         polarization (极化)
         polarized beams (极化束)
         polarized nuclei (极化核)
         polarized products (极化产物)
         polarography (极谱法)
         polarons (极化子)
         policy (政策)
         polio virus (脊髓灰质炎病毒)
         poliomyelitis (脊髓灰质炎)




         polyphenyls (聚苯)
         polyploidy (多倍性)
         polyporus versicolor (杂色多孔菌属)
         polypropylene (聚丙烯)
         polysaccharides (多糖类)
         polystyrene (聚苯乙烯)
         polysulfides (多硫化物)
         polytetrafluoroethylene (聚四氟乙烯)
         polythene (聚乙烯)
         polythionic acids (连多硫酸)
         polyurethanes (聚氨基甲酸乙酯)
         polyvinyl acetate (多乙酸乙烯酯)
         polyvinyl alcohol (聚乙烯醇)
         polyvinyl chloride (聚氯乙烯)
         polyvinylidene fluoride
         polyvinylpyrrolidone (聚乙烯吡咯烷酮)
         polyvinyls (乙烯类聚合物)
         ponderomotive force (有质动力)
         ponds (池)
         pool boiling (池沸腾)
         pool event (池试验)
         pools (池)
         poor people (贫民)
         poplars (杨树属)
         popop (二苯基呃唑苯)



         position optical
         position sensitive detectors (位置灵敏探测器)
         positioning (定位)
         positive column (阳极区)
         positive excess (正电荷过剩)
         positive ions (正离子)
         positron beams (正电子束)
         positron decay (正电子衰变)
         positron detection (正电子探测)
         positronium (电子偶素)
         positrons (正电子)
         post-irradiation examination (辐照后检验)
         postal services (邮电业)
         potable water (饮用水)
         potassium (钾)
         potassium 34 (钾-34)
         potassium 35 (钾-35)
         potassium 37 (钾-37)
         potassium 40 (钾-40)
         potassium 41 (钾-41)
         potassium 42 (钾-42)
         potassium 55 (钾-55)
         potassium 56 (钾-56)
         potassium complexes (钾配合物)
         potassium compounds (钾化合物)


         potassium fluorides (氟化钾)
         potassium iodides (碘化钾)
         potassium ions (钾离子)
         potassium oxides (氧化钾)
         potassium sulfates (硫酸钾)
         potato plant (马铃薯植物)
         potato tubers (马铃薯块茎)
         potatoes (马铃薯)
         potential barriers (势垒)
         potential electric
         potential energy (势能)
         potential flow (潜流)
         potential scattering (势散射)
         potentials (势)
         potentiometers (电位计)
         potentiometry (电势分析法)
         potentiostats (恒电势器)
         potomac river (波托马克河)
         potting (灌封)
         potting materials (灌封材料)
         poultry (家禽)
         pour point (流动点)
         powder metallurgy (粉末冶金)
         powder river basin (保德流域)
         powders (粉末)




         preferred orientation (择优取向)
         preferred species (优选品种)
         pregnancy (妊娠)
         pregnanediol (孕二醇)
         pregnanes (孕烷)
         pregnanetriol (孕三醇)
         pregnenolone (孕烯醇酮)
         preheating (预热)
         prenatal exposure (出生前照射)
         preons (前子)
         preparation chemical
         preparation sample
         present worth method (现值法)
         preservation (保藏)
         preservatives (防腐剂)
         presses (压机)
         pressing (压制)
         pressure coefficient (压力系数)
         pressure control (压力控制)
         pressure critical
         pressure dependence (压力相关性)
         pressure drop (压降)
         pressure effects (压力效应)
         pressure gages (压力表)
         pressure gradients (压力梯度)


         pressure groups (压力集团)
         pressure maintenance (压力维持)
         pressure measurement (压力测量)
         pressure plasma
         pressure radiation
         pressure range (压力范围)
         pressure regulators (压力调节器)
         pressure release (压力释放)
         pressure suppression (压力抑制)
         pressure tube reactors (压力管式堆)
         pressure tubes (压力管)
         pressure vapor
         pressure vessels (压力容器)
         pressurization (加压)
         pressurized water reactors (压水堆)
         pressurizers (加压器)
         pressurizing (增压)
         prestressed concrete (预应力混凝土)
         preventive medicine (预防医学)
         prices (价格)
         pricing regulations (定价规章)
         primary batteries (原电池组)
         primary recovery (初次开采)
         primates (灵长目)
         primene (混合伯胺)


         prince edward island (爱德华王子岛省)
         printed circuits (印刷电路)
         printing and publishing industry (印刷出版工业)
         prisms (棱柱)
         privacy act (保密法规)
         private law (私法)
         private vehicles (自用车辆)
         probabilistic estimation (概率估算)
         probabilistic safety assessment (概率性安全评估)
         probability (概率)
         probability density functions (概率密度函数)
         probes (探针)
         procaine (普鲁卡因)
         proceedings (会议录)
         process computers (过程控制计算机)
         process control (过程控制)
         process heat (工艺热)
         process solutions (生产溶液)
         processes adiabatic
         processes isothermal
         processing (处理)
         processing data
         processing food
         processing images
         processing ores


         processing wastes
         proctitis (直肠炎)
         procurement (采购)
         producer gas (发生炉煤气)
         producer price index (生产价格指数)
         product labeling (产品商标)
         production (生产)
         production beam
         production capacity (生产能力)
         production hydrogen
         production isotope
         production logging (生产测井)
         production particle
         production plasma
         production reactors (生产堆)
         production tax (生产税)
         productivity (生产率)
         productivity factor (采油指数)
         professional personnel (专业人员)
         professions (专业)
         profits (利润)
         proflavine (原黄素)
         progeny (后代)
         progesterone (黄体酮)
         progestin (孕酮)


         program management (规划管理)
         programming (程序设计)
         programming languages (程序设计语言)
         progress report (进展报告)
         project castle (城堡计划)
         project greenhouse (温室计划)
         project management (项目管理)
         project sunshine (阳光计划)
         projectiles (抛射体)
         projection operators (投影算符)
         projection welding (凸焊)
         prolactin (催乳素)
         proliferation (核扩散)
         proliferation cell
         proline (脯氨酸)
         prolog (PROLOG语言)
         promazine (丙嗪)
         promethazine (异丙嗪)
         promethium (钷)
         promethium 147 (钷-147)
         promoters (促进剂)
         prongs (星叉)
         prony method (普朗尼法)
         propadiene (丙二烯)
         propagation wave


         propagator (传播子)
         propane (丙烷)
         propanol 1-
         propanols (丙醇)
         propanone (丙酮)
         propellants (推进剂)
         propenal (丙烯醛)
         propene (丙烯)
         proper motion (固有运动)
         properdin (备解素)
         properties chemical
         properties mechanical
         properties physical
         property insurance (财产保险)
         property management (财产管理)
         property rights (财产权)
         property values (财产价值)
         prophase (前期(细胞分裂))
         prophylaxis (预防)
         propine (丙炔)
         propionic acid (丙酸)
         proportional counters (正比计数器)
         proposals (投标)
         propping agents (支撑剂)
         propulsion (推进)


         propulsion systems (推进系统)
         propyl radicals (丙基)
         propylene (丙烯)
         propylene carbonate (碳酸丙烯)
         propyne (丙炔)
         prospecting (探矿)
         prostaglandins (前列腺素)
         prostate (前列腺)
         prostheses (假体)
         protactinium (镤)
         protamines (鱼精蛋白)
         protection (保护)
         protection corrosion
         protection radiation
         protection safety
         protective clothing (防护衣具)
         protective coatings (保护涂层)
         protein denaturation (蛋白质变性)
         protein engineering (蛋白质工程)
         protein sequencing (蛋白质定序)
         protein structure (蛋白结构)
         proteins (蛋白质)
         proteolipids (蛋白脂质)
         proteolysis (蛋白水解)
         proteus (变形杆菌属)



         prussian blue (普鲁士蓝)
         psd (防止重大恶化)
         pseudomonas (假单胞菌属)
         pseudoscalar mesons (赝标量介子)
         pseudoscalars (赝标量)
         psoralen (补骨脂素)
         psoriasis (牛皮癣)
         psychoactive agents (精神治疗药剂)
         psychology (心理学)
         psychoses (精神病)
         psychotropic drugs (精神治疗药物)
         psychrometry (湿度测定法)
         pteridines (蝶啶)
         pterins (蝶呤)
         pteroylglutamic acid (蝶酰谷氨酸)
         ptfe (聚四氟乙烯)
         public anxiety (公众忧虑)
         public attitudes (公众看法)
         public buildings (公共建筑物)
         public corporations (国有公司)
         public enterprises (国有企业)
         public health (公共卫生)
         public information (公众信息)
         public lands (公有土地)
         public law (公法)



         pulses (脉冲)
         pulverization (磨碎)
         pulverized fuel ash (粉状灰烬)
         pulverizers (粉碎机)
         pumice (浮石)
         pump turbines (水泵水轮机)
         pumped storage (抽水蓄能)
         pumped storage power plants (抽水蓄能电厂)
         pumping (抽运)
         pumping laser
         pumps (泵)
         pupae (蛹)
         purex process (普雷克斯过程)
         purification (纯化)
         purines (嘌呤)
         purity (纯度)
         puromycin (嘌呤霉素)
         purpura (紫癜)
         putrescine (腐胺)
         pva (聚乙烯醇)
         pvc (聚氯乙烯)
         pvd (物理蒸气淀积)
         pvp (聚乙烯吡咯烷酮)
         pwba (平面波玻恩近似)
         pyranometers (日射强度计)


         pyrans (吡喃)
         pyrazines (吡嗪)
         pyrazoles (吡唑)
         pyrazolines (吡唑啉)
         pyrene (芘)
         pyrex (硼硅酸耐热玻璃)
         pyridazines (哒嗪)
         pyridine (吡啶)
         pyridines (吡啶类)
         pyridoxal (吡哆醛)
         pyridoxine (吡哆素)
         pyrimidine dimers (嘧啶二聚物)
         pyrimidines (嘧啶)
         pyrite (黄铁矿)
         pyrites (硫化铁矿类)
         pyrocarbon (高温炭)
         pyrocatechin (邻苯二酚)
         pyrocatechol (焦儿茶酚)
         pyrocatechol violet (邻苯二酚紫)
         pyrochlore (烧绿石)
         pyroelectric detectors (热电探测器)
         pyroelectric effect (热电效应)
         pyroelectricity (热电)
         pyrogallic acid (焦棓酸)
         pyrogallol (焦棓酸)


         pyrogens (致热原)
         pyrolysis (热解)
         pyrolysis products (热解产物)
         pyrolytic carbon (热解碳)
         pyrolytic gases (热解气体)
         pyrometallurgy (火法冶金)
         pyrometers (高温计)
         pyrones (吡喃酮)
         pyrophosphates (焦磷酸盐)
         pyrophyllite (叶蜡石)
         pyrosol process (熔溶胶过程)
         pyrotechnic devices (烟火装置)
         pyroxenes (辉石)
         pyroxylin (火棉)
         pyrrhotite (磁黄铁矿)
         pyrroles (吡咯)
         pyrrolidines (吡咯烷)
         pyrrolidinones (吡咯烷酮)
         pyruvic acid (丙酮酸)
         pzt (锆钛酸铅)