No one dares to swim, because the water is polluted and on one knows how deep it is.
没有再敢在河里游泳了，因为河水已经被污染了，没人知道河到底有多深。
Besides, you will not find coral near the mouths of rivers either Because the river water has too much soil in it or Because it is polluted.
此外，在江河的入海口附近也不会有珊瑚，因为江水要么含有太多的泥土，要么就是被污染了。
Now the water we can use is not enough for us because the human beings have polluted it a lot.
此时我们能够使用的水是不够的我们因为人类污染了它很多。
Now the water we can use is not enough for us because the human beings have polluted it a lot.
此时我们能够使用的水是不够的我们因为人类污染了它很多。
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