| 释义 |
DEFINITIVE EXAMPLES 权威例句〔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〔electrovalence〕Valence characterized by the transfer of electrons from atoms of one element to atoms of another during the formation of an ionic bond between the atoms.电价：在原子间形成离子键的过程中，由电子从一种元素的原子转移到另一种元素的原子所表示的价美国传统 |