如果是需要翻译的话就是：树木对于空气有两个重要作用.对吗?
If you want to know the answer to this question,that will be:yes.
tress do two main things to the air.is that true
tress do two main things to the air.is that true
英语人气：432 ℃时间：2019-09-25 13:43:33
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