The best prevention for cholera is to boil or filter water, and eat only well-cooked food.

预防霍乱最好的方法是把水煮沸或过滤，并且只吃煮熟的食物。

《柯林斯英汉双解大词典》

A MERV rating tells you how well the filter can remove pollen and mold from the air as it passes through.

MERV 等级可以让你知道当花粉和霉菌在空气中传播时，过滤器将如何将之过滤。

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For instance, a program that counts might be very useful, even though it doesn't work well as a filter.

例如，某个程序在执行计数时可能非常有用，尽管它作为过滤器工作得并不好。

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And actually, a question that might come up, I just explained, the sodium channel, you might say, well, how do potassium channels work then, because I can understand how you can filter something big out, but how do you filter out something small.

实际上，可能大家会问一个问题，我刚解释过，钠离子通道，你可以说，好吧，那么钾离子通道该如何起作用呢，因为我可以理解你是如何把大东西过滤掉的，但是你如何把小东西过滤掉呢？

麻省理工公开课 - 化学原理课程节选

Oprah Winfrey made headlines by declaring her support for Barack Obama, and Bill Clinton has been stumping for his wife, but some rather unlikely celebrity endorsements have begun to filter in as well.

FORBES: Endorsement Rap

The TV Wonder 650 is based on the Theater 650 chip, including a "motion-adaptive 3D comb filter" as well as noise reduction, and touts the ability to work in Vista systems, even though it's still questionable whether the rest of your system will.

ENGADGET: ATI releases TV Wonder 650 OTA HDTV tuner card

In case you don't have your smartphone app handy, the taps are equipped with LED lights to show the water's filter status as well -- blue means clean, yellow means not so much and red means you should probably get a new filter, pronto.

ENGADGET