谁能以Why are trees important为题写一篇八十字左右的英语文章

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谁能以Why are trees important为题写一篇八十字左右的英语文章

As we all konwn that the world becomes hotter now,one of the reason is that desertification and degeneration of the grassland is increasingly serious.受字数限制,请参看下参考资料中的文章,...