It's illegal, so they can't sign that as a contract, but they they can just agree to do it.

因为是违法的,合同也就无效了,不过他们可以私下达成默契

耶鲁公开课 - 博弈论课程节选

because I do have elements that I really agree with such as you have to do community service.

因为这当中有我十分赞同的部分，比如你必须参加社区服务。

选美比赛的好处 - SpeakingMax英语口语达人

We don't know how to measure that either; do you agree?

我们不知道如何去测量它,是吧

耶鲁公开课 - 基础物理课程节选

If the right to private property is natural, not conventional, if it's something that we acquire even before we agree to government, How does that right constrain what a legitimate government can do?

如果私有财产是与生俱来的，而非约定俗成，如果这是在我们同意组建政府前就拥有的，这个权利又如何能限制合法政府的行为呢？

耶鲁公开课 - 公正课程节选