Any air filter can use one (or more) of three different techniques to purify air.

任何空气过滤器都会采用下述三种空气净化技术的其中一种(或多种)。

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

可以净化空气，是健康与艺术的结合。

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Trees can purify the air.

树可以净化空气。

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Trees can purify the air.

树可以净化空气。

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