我们都知道，环境的巨大破坏已带来负面影响，甚至对人类生存带来巨大的威胁。
As we know, massive destruction of environment has brought about negative effects and even poses a great threat to man's existence.
环境的巨大破坏已带来负面影响，甚至对人类生存带来巨大的威胁。
Massive destruction of environment has brought about negative effects and even poses a great threat to man's existence.
整个地球生态平衡正在改变，环境的巨大破坏已带来负面影响，甚至对人类生存带来巨大威胁。
Massive destruction of environment has brought about negative effects and even poses a great threat to mans existence.
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