環境的變化 The Change of Environment

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When we go to school, teachers always teach us to protect the environment, so as to protect human being. Today, the environment has been polluted badly. The river in my hometown becomes dirty and no one will play there. We can barely see birds flying in the sky. The change of environment needs us to improve. 
上學時老師總是教我們要保護環境，也就是保護人類。如今，環境污染嚴重，我家鄉的河流變髒了，也沒有人下去玩耍了。我們幾乎看不到鳥兒在天上飛。環境的變化需要我們去改善。