It will wash away and so you got to pick the right materials in order to build a bridge.

它可能会被水冲走,之后人们就会选择更好的材料,以造出了更为坚固的桥

耶鲁公开课 - 生物医学工程探索课程节选

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