可以净化空气，是健康与艺术的结合。

Can purify the air, is a combination of health and arts.

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森林不但可以净化空气，而且可以减少噪音。

Forests can not only fresh the air but also reduce noises.

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树可以净化空气。

Trees can purify the air.

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此外，也可以利用空气净化器来清洁室内空气。

Moreover, families can make use of air purifiers to clean the indoor air.

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树木可以帮助净化空气。

Trees can help clean the air.

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树木可以帮助净化空气。

Trees can help clean the air.

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