滤的用法和样例：
例句
-
饮用水均须过滤净化。
All drinking water must be filtered. -
过滤网可存住空气中的尘埃。
A filter traps dust from the air. -
把咖啡倒入滤器里让水流过。
Put the coffee in the filter and let the water run through. -
用不了多少时间就可以把咖啡过滤好。
It won't take long to filter the coffee. -
你需要把饮用水过滤。
You need to filter the drinking water. -
做试验前，老师给我们每个人发了一张滤纸。
The teacher gave each of us a piece of filter paper before doing the experiment.
