You might use a yellow filter to improve the clarity of a hazy horizon.

你可以用一个黄色滤光器来提高模糊的地平线的清晰度。

《柯林斯英汉双解大词典》

We need a filter or a lens to talk about then what is ultimately in control.

我们需要一个过滤器或一个镜头来谈论最终控制的是什么。

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Your thoughts and attitudes act like a filter, a screen or lenses, through which you see the world in a particular way, which does not always depicts reality.

你的想法和态度就像一个过滤器、一个筛子或一个透镜，通过它们，你就用一个特别的方式来看这个世界，但是这个方式并不总是能揭示真相。

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A protective coating of colloidal silver is painted on the inside and outside of the filter to kill bacteria.

VOA: special.2009.06.22

Ultimately, we need a filter or a lens to talk about then what is ultimately in control.

最终，我们需要一个视窗，一个镜头,来讨论什么是最终的控制者。

普林斯顿公开课 - 人性课程节选

What all of these channels have is what's called a selectivity filter, so this filter filters out the type of ion that's going to be allowed through.

这些离子通道都有的一部分,就是所谓的选择性过滤器，这个过滤器,会滤过允许穿过的离子。

麻省理工公开课 - 化学原理课程节选

As I turned back onto the I-90 towards Toledo and eventually Detroit, after a nutritious burger and fries, a filter took cars onto the interstate across a lane of oncoming traffic.

BBC: The selfless America outsiders don't see

After all, how can one prove beyond doubt that a water filter prevented a child from falling sick?

ECONOMIST: Face value

If someone who knew how to make a filter had a conversation with someone who knew a lot about cancer and with someone who read the medical literature like a physicist, then maybe you could come up with a cancer treatment.

NEWYORKER: In the Air