How many of you have a written contract, stuck with a magnet on the fridge, telling you when you're supposed to tidy up.

有人写过协议吗,在冰箱上贴个磁力贴,规定好什么时候该谁打扫房间

耶鲁公开课 - 博弈论课程节选

There's no rule about how you're supposed to use the word "Language."

因为并没有什么,关于应当如何运用"语言"一词的规定

耶鲁公开课 - 心理学导论课程节选

I know what the rules are.

我知道规定是什么。

麻省理工公开课 - 固态化学导论课程节选