If the question of time is not explicitly brought up, then you should know that you have to use this formula.

如果时间的问题并没有明确提出,那你应该知道,必须要用这个式子

耶鲁公开课 - 基础物理课程节选

Incidentally, you also have human rights, but these are only fulfill to the extent that other people understand their own primary obligations first.

顺便说一句，你也有人权，但要行使这些权利必须,先使他人明确他们自己的首要责任。

普林斯顿公开课 - 人性课程节选