我很清楚，挖沟排水和筑坝拦水正把许多河流和沼泽地搞得一团糟。

I was well aware that draining and damming were making a mess of many rivers and wetlands.

youdao

我很清楚，挖沟排水和筑坝拦水正把许多河流和沼泽地搞得一团糟。

I was well aware that draining and damming were making a mess of many rivers and wetlands.

youdao