double covalent bond双键
double valence bond双键
double-bond positional双键位置
Double-bond effect重键效应
double-bond addition双键加成反应
double electron bond双电子键
double-bond isomers双键异构体
double-bond isomerization双键异构
double change bond analogue双键改变类衍生物
N(名词) a type of chemical bond consisting of two covalent bonds linking two atoms in a molecule 双键