| 单词 | 正电 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔FDG〕FDG-PET is an imaging test to identify lymphomas and other cancers.氟18脱氧葡萄糖正电子计算机断层扫描是一种可用来确认淋巴癌和其他癌症的影像测试。剑桥高阶〔PET scanner〕A device that produces cross-sectional x-rays of metabolic processes by means of positron emission tomography.正电子发射层析扫描仪：一种装置，通过正电子放射的X射线断层照相术产生的模截面X射线的代谢过程美国传统〔PET scanning〕The act or process of using a PET scanner.正电子发射层析扫描：用正电子发射层析扫描仪的动作或过程美国传统〔PET scan〕A cross-sectional image produced by a PET scanner.正电子发射层析扫描图：由正电子发射层析扫描仪所绘制的模截面图美国传统〔PET scan〕The researchers carried out a PET scan to monitor his brain activity.研究人员采用正电子计算机断层摄片来监看他的大脑活动。剑桥高阶〔acid〕A substance that ionizes in solution to give the positive ion of the solvent.酸性物质：一种在溶解时发生电离从而使溶剂带上正电荷的物质美国传统〔alpha particle〕A positively charged particle, indistinguishable from a helium atom nucleus and consisting of two protons and two neutrons.α粒子：与氦原子核难以区分的带正电的粒子，包括两个质子和两个中子美国传统〔annihilate〕To participate in annihilation, as do an electron and a positron.湮灭，湮没：湮灭，如电子与正电子美国传统〔anode〕A positively charged electrode, as of an electrolytic cell, a storage battery, or an electron tube.阳极，正极：电解电池、蓄电池或电子管的正电电极美国传统〔boride〕A binary compound of boron with a more electropositive element or radical.硼化物：硼和带正电荷的元素或原子团形成的二元化合物美国传统〔cation〕An ion or group of ions having a positive charge and characteristically moving toward the negative electrode in electrolysis.阳离子：带有正电荷的一个或一群离子，特点为在电解中向阴极运动美国传统〔charge〕If one or more electrons be removed, the atom is said to be positively charged.如果原子失去了一个或多个电子,我们就说原子带正电荷。英汉大词典〔charge〕The proton has positive electrical charge.质子带正电荷。麦克米伦高阶〔deuteron〕The nucleus of a deuterium atom, consisting of a proton and a neutron, regarded as a subatomic particle with unit positive charge.氘核：氘原子的原子核，由一个质子和一个中子组成，被视为带单位正电荷的亚原子美国传统〔electropositive〕Capable of acting as a positive electrode.电正性的：能做正电极的美国传统〔electropositive〕Having a positive electric charge.带正电的美国传统〔halide〕A chemical compound of a halogen with a more electropositive element or group.卤化物：由一种卤素与另外一带正电的金属元素或族形成的一种化合物美国传统〔inlet〕As air passes over the metal body, or flows through air inlets, it becomes positively charged.空气经过金属体或从进气口通过, 就会带正电。外研社新世纪〔iodide〕A compound of iodine with a more electropositive element or group.碘化物：碘与带更多正电的元素或原子团生成的化合物美国传统〔negatron〕An electron with a negative charge, as contrasted with a positron.电子：带有负电荷，与正电荷相反的电子美国传统〔neutral〕Atoms consist of positively-charged protons, negatively-charged electrons and neutral particles called neutrons.原子由带正电的质子、带负电的电子和称为中子的不带电粒子组成。剑桥高阶〔nitride〕A compound containing nitrogen with another more electropositive element, such as phosphorus or a metal.氮化物：一种含有氮和另外一种更具正电性元素的化合物，如磷或金属的化合物美国传统〔positive〕Physics A positive electric charge.【物理学】 正电：正电荷，阳电荷美国传统〔positive〕Physics Relating to or designating electric charge of a sign opposite to that of an electron.【物理学】 正电的：与电子所带电性相反的电荷的，表示正电的或阳性的美国传统〔positronium〕A short-lived association of an electron and a positron bound together in a configuration resembling the hydrogen atom.电子偶素，正电子素：电子与正电子的短暂结合物，两者的结合物与氢原子的结构十分相似美国传统〔repel〕Two positive charges repel each other.两个正电荷相互排斥。朗文当代〔repel〕Two positive electrical charges repel each other.两个正电荷相互排斥。韦氏高阶〔salt〕A chemical compound formed by replacing all or part of the hydrogen ions of an acid with metal ions or electropositive radicals.盐类：由金属离子或正电原子团替代酸中所有或部分的氢离子而得到的化合物美国传统A proton has positive charge and an electron has negative charge.质子带正电荷，电子带负电荷。剑桥国际Acids produce positively charged hydrogen atoms when dissolved in water.酸在水中溶解时可生成带正电荷的氢原子。剑桥国际Atoms consist of positively-charged protons, negatively-charged electrons and neutral particles called neutrons.原子由带正电荷的质子、带负电荷的电子和称为中子的不带电微粒构成。剑桥国际 |
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