He has seen the pristine river of his childhood become polluted and fish populations disappear.
他亲历了儿童时代的河流一步步被污染，鱼类一点点的消失。
鱼死于被污染的水。
The fish died because the river was badly polluted.
因为河流严重污染，鱼都死了。
The polluted water not only kills fish it is also harmful to our health.
水污染不仅仅造成鱼类的死亡也对我们的健康有害。
The fish died because of the polluted water.
鱼死于被污染的水。
The river is polluted and the fish cannot live.
河流污染，鱼不能生存。
The water may become so polluted that it kills all the fish in the river.
水被污染了，所有的鱼都死在河里面。
The poison in the waste killed fish and plants and polluted the river.
垃圾里的毒毒死了鱼和植物并且污染了河流。
The poison in the waste killed fish and plants and polluted the river.
垃圾里的毒毒死了鱼和植物并且污染了河流。
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