ZSF68 在人工心肺机血液循环时用作消泡剂，防止空气进入。
ZSF68 can be used as defoaming agent in heart-lung machine blood circulating to prevent air enter.
这种塑料袋用于防止空气进入储藏的粮食，它是一种应对虫害和食品保鲜的简单手段。
These bags are designed to keep air out of crops in storage. They are a simple way to fight insects and keep food fresh.
随后，车主将不得不关闭的散热器。但是，他们必须确保他们关闭它完全防止空气进入。
Following that, the car owners will have to close the radiator. But, they will have to make sure that they close it perfectly to prevent air from getting in.
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