Factory chimneys discharge smoke into the atmosphere make it dirty.

工厂的烟囱往空气里排烟，造成大气污染。

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Factory chimneys discharge smoke into the atmosphere and make it dirty.

工厂的烟囱往空气里排烟，造成大气污染。

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He intends to use a chemically unusual form of iron to clean water up, not make it dirty.

他将利用铁原子的一种非通常化学形态来净化水源，而非污染水源。

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"We've got to be better, go to the dirty areas, make it hard, make it so he can't get out of his crease, " said Rangers defenseman Ryan McDonagh, whose delay-of-game penalty in overtime led to the winning goal.

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It's an escape that doesn't make you feel dirty.

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It may push dirty industries to less well regulated countries and make the overall problem somewhat worse.

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