atom

英 [ˈætəm]

美 [ˈætəm]

n.  原子

复数：atoms　

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Oxford 3000 / Collins.2 / BNC.4241 / COCA.5184

牛津词典

noun

• 原子
  the smallest part of a chemical element that can take part in a chemical reaction
  1. the splitting of the atom
     原子的分裂
  2. Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.
     两个氢原子和一个氧原子结合组成一个水分子。

柯林斯词典

• N-COUNT 原子
  Anatomis the smallest amount of a substance that can take part in a chemical reaction.
  1. A methane molecule is composed of one carbon atom attached to four hydrogens.
     甲烷分子由1个碳原子与4个氢原子构成。

英英释义

noun

• (nontechnical usage) a tiny piece of anything
  Synonym:moleculeparticlecorpusclemotespeck
• (physics and chemistry) the smallest component of an element having the chemical properties of the element

双语例句

• A methane molecule is composed of one carbon atom attached to four hydrogens.
  甲烷分子由1个碳原子与4个氢原子构成。
• His theory of atom was not sufficient for treatment of large atoms or molecules.
  他的原子理论用于处理大的原子和分子是不能令人满意的。
• An atom normally contains equal numbers of electrons and protons.
  原子在正常情况下含有数目相等的电子和质子。
• An atom itself is a complete whole, with its electrons, protons and neutrons and other elements
  一个原子本身就是一个完整的整体，包括电子、质子、中子及其他元素。
• And ion, which is an atom or group of atoms with an electrical charge.
  和离子，它是一个原子或原子的电荷组。
• The V2 was not an ordinary weapon: it could only be used against cities. Likewise the atom bomb.
  V2火箭并非普通武器：它只能用于对付城市。原子弹也是这样。
• The chief differences between chlorophyll and heme are the presence of a magnesium atom in the center of the porphyrin ring.
  叶绿素和血红素之间的主要的差别为在卟啉环中心存在一个镁原子。
• There isn't atom of sense in what you say.
  你所说的话没有道理。
• So there's one electron in each hydrogen atom.
  所以每个氢原子中有两个电子。
• Ion: Atom or group of atoms with one or more positive or negative electric charges.
  离子：带有一个或多个正电荷（阳离子）或负电荷（阴离子）的原子或原子团。