我们不能让这水白白流掉。

We mustn't let the water run to waste.

《新英汉大辞典》

水很快就会流掉。

The water will soon drain away [off].

《新英汉大辞典》

首先必须把水从水槽中流掉。

You must first run off the water from the tank.

youdao

Sexual relations will be intended purely for the sake of reproduction and unwanted fetuses will be aborted.

性关系,将只是单纯为了生育,而有缺陷的胎儿将会被流掉。

耶鲁公开课 - 政治哲学导论课程节选