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

• So there's one electron in each hydrogen atom.
  所以每个氢原子中有两个电子。
• The power of the atom can be used to produce electricity.
  原子能可以用来发电。
• A neutron is simply a neutral particle in the nucleus of an atom.
  中子就是原子核里不带电的粒子。
• He patented the idea that the atom could be split
  他获得了“原子可以再分”这一概念的专利权。
• Each of the four valency electrons of the carbon atom is shared with one of a hydrogen atom.
  碳原子的四个价电子都各与氢原子的一个价电子共用。
• The compact core of the atom begins to appear.
  紧凑的原子内核现身了。
• The anion OH having one oxygen and one hydrogen atom.
  含一个氧原子和一个氢原子的OH负离子。
• This simple molecule consists of one oxygen atom and two hydrogen atoms.
  这个简单的水分子由一个氧原子和两个氢原子构成。
• A molecule of ammonia is made up of one atom of nitrogen and three atoms of hydrogen.
  氨分子包含一个氮原子和三个氢原子。
• I started by saying, literally: This is an atom; this is a molecule.
  我的第一堂课是这样开始的：这是一个原子；这是一个分子。