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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

        • So there's one electron in each hydrogen atom.
          所以每个氢原子中有两个电子。
        • 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。
        • 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。
        • We utilize the atoms interact resonantly with a single-mode cavity, and introduce an auxiliary atom.
          提出了一个利用单模腔场和原子的共振相互作用制备团簇态的方案,并引入了辅助原子。
        • 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。
        • 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。
        • 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。
        • 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。
        • 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。
        • So, which atom is in need of those lone pair electrons?
          那么,哪个原子需要这对孤对电子呢?