paired electrons

• 成对电子

paired electrons的用法和样例：

例句

1. For the case of electrons an important restriction comes into play.
   对电子而言，有一个重要的限制性条件在起作用。
2. Alkanes have only single covalent bonds, meaning that the bonds are formed by two carbon atoms sharing a pair of electrons.
   链烷只有单一的共价键，这意味着共价键是由两个碳原子分享一对电子。