力偶的英文：
couples

couples是什么意思：
n. 对，双；配偶，夫妻；数个
v. 连接，结合；加上；性交；成婚

bayonet coupling
卡口式联结

It is not every couple that is a pair
成双并非皆配偶

Every couple is not a pair
同床异梦,貌合神离

The young couple decided to have a child.
小两口决定要个孩子。

The priest married the couple.
牧师为那对新人主持婚礼。