It may pollute the air, the water and the places we live in.
它会污染空气、水和人们居住的场所。
If we burn them, they not only harm people, but (also) pollute the air.
如果烧了这些树叶,不但会损害人体健康而且污染环境。
It may pollute the air, the water and the places we live in.
它可能会污染空气、水和我们居住的地方。
We promise not to pollute the air.
我们承诺不污染空气。
We promise not to pollute the air.
我们承诺不污染空气。
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