They make it very costly, socially costly, to divorce, so then they stay together for all kinds of reasons, not always such good ones.

离婚社会代价太大，因此双方由于各种原因不分开，不是所有原因都是好的。

耶鲁公开课 - 心理学导论课程节选

Everybody--all of this is voluntary on both sides of every agreement.

所有人,所有事情,都是以双方自愿为协议的

耶鲁公开课 - 古希腊历史简介课程节选