英语语法分析

Forty percent of the waterways have become undrinkable.

百分之四十的河川水道已变得不可饮用。

Also, dirty water from factories goes into rivers and makes it undrinkable.

同样的， 工厂排出到河里的废水也使得水无法饮用。

You should have put the milk into the ice-box. I expect it has become undrinkable by now.

你本来该把牛奶放到冰箱里。我估计它现在已经不能喝了。