The river becomes very dirty, so I couldn't swim in it anymore.
河水变得非常脏，所以我再也不能在里面游泳了。
The river has become very dirty. Lots of fish have died.
河变得很脏。大量的鱼都死掉了。
But now when I went back to my hometown, the river was very dirty, the water was light yellow and there were so many rubbish floating in the river.
但是现在当我回到家乡，河水很脏，水是淡黄色的，有很多垃圾漂浮在河里。
The river was rather dirty, but she was very thirsty, so she drank some water from it.
这条河相当肮脏，但她非常渴，所以她喝了一些河水。
The river was rather dirty, but she was very thirsty, so she drank some water from it.
这条河相当肮脏，但她非常渴，所以她喝了一些河水。
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