molecular filter

例句：

1. 1. The molecular filter is usedto remove impurities from the liquid.
   分子过滤器用于从液体中去除杂质。
2. 2.The molecular filter is crucial for purifyingthe water.
   分子过滤器对于净化水至关重要。
3. 3.The molecular filter is designed to trap particlessmaller than a certain size.
   分子过滤器被设计用来捕捉小于某个特定尺寸的粒子。