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atom

英 [ˈætəm]

美 [ˈætəm]

n.  原子

复数:atoms 

高考CET4CET6考研TOEFLTEM4TEM8计算机

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
      1. (physics and chemistry) the smallest component of an element having the chemical properties of the element

        双语例句

        • A proton or a neutron has about the same mass as a hydrogen atom.
          质子或中子的质量和氢原子的质量大致相同。
        • Water is spoken of as containing two atoms of hydrogen and one atom of oxygen.
          人们说水含有两个氢原子和一个氧原子。
        • 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。
        • 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。
        • 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。
        • 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。
        • 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。
        • In this model the arrangement of bonds around the central atom is considered to depend upon how many valence-shell electron pairs.
          在这个模型中,认为围绕中心原子的化学键的排列取决于价层中电子对的数量。
        • Neutrons and protons are bound together in the nucleus of an atom.
          在原子核里,中子和质子是结合在一起的。
        • The power of the atom can be used to produce electricity.
          原子能可以用来发电。