The function of the main fan in coal mine is to keep fresh air and reduce the concentration of gas.

煤矿主扇风机的主要功能是保证井下空气畅通新鲜，降低瓦斯浓度。

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For ourselves, all we could to do is to often and regular wash hands, open Windows keep fresh air in our home.

对我们自己而言，我们能做到的就是经常洗手，打开窗户，保持家里新鲜空气。

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He told them to take it off and keep me out in the fresh air.

他要求他们把它取下来，让我出去呼吸新鲜空气。

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The absence of tight oversight has allowed makers of herbal products to flourish, particularly in Utah, where the dry desert air helps keep raw materials and pills and capsules fresh, and where land and skilled labor have been relatively inexpensive.

CNN: ASIANOW - TIME Asia

At this point, in order to breathe, our only option was to keep moving to an open space where we could take a deep breath of fresh air.

CNN: , Special to