| 单词 | covalent |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔acceptor〕The atom that contributes no electrons to a covalent bond.受体：没有给共价键提供电子的原子美国传统〔acid〕A molecule or ion that can combine with another by forming a covalent bond with two electrons of the other.分子，离子：可通过两个电子形成共价键而结合在一块的分子或离子美国传统〔base〕A substance that provides a pair of electrons for a covalent bond with an acid.共价化合物：能够提供一对电子给一个酸形成共价键的化合物美国传统〔chemical bond〕Any of several forces or mechanisms, especially the ionic bond, covalent bond, and metallic bond, by which atoms or ions are bound in a molecule or crystal.化学键：使原子或离子结合成分子或晶体的力量或历程，尤指离子键、共价键和金属键美国传统〔cross-link〕To join (adjacent chains of a polymer or protein) by creating covalent bonds.联接：通过形成共价键来联接（聚合物或蛋白质的相邻链）美国传统〔double bond〕A covalent bond in which two electron pairs are shared between two atoms.双键：两个原子之间的两个电子对的共价键美国传统〔electron pair〕Two electrons functioning or regarded as functioning in concert, especially two electrons that form a nonpolar covalent bond between atoms.电子对：协调运行或被认为是协调运行的两个电子，尤指在原子间形成非极性共价键的两个电子美国传统〔ribozyme〕An RNA segment that has the ability to catalyze the cleavage and formation of covalent bonds in RNA strands at specific sites.核糖核酸酶：能够在特定位置催化核糖核酸链中共价键分裂和形成的核糖核酸片段美国传统〔single bond〕A covalent bond in which one electron pair is shared by two atoms.单键：两个原子共用一个电子对的电子价美国传统〔triple bond〕A covalent bond in which three electron pairs are shared between two atoms.三键：两个原子共享三对电子的共价键美国传统 |
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