Either keep up the good work or you better change your strategy because you are not mastering the material.

保持好的工作,或者你最好改变你的策略,因为你不擅长处理这个材料。

麻省理工公开课 - 固态化学导论课程节选

There's this whole sense that the thing is precarious and you'd better kind of mind your Ps and Qs, or whatever the expression is, and be a good person or this whole thing could kind of be literally flooded away.

从这个场景中可以看出堤坝相当不稳定,你最好想想干过什么缺德事儿,或者捅过什么篓子之类的,总之得做个好人,否则,这整个城市就可能真会被大水冲走

耶鲁公开课 - 欧洲文明课程节选