So clear, does not pass through the filter one one into your ears, like winter rain, a drip drop into your heart.

那么的清晰，不经过滤地一一传入你的耳际，就像冬天里的雨，一滴一滴地滴入你的心里。

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A large column of air will pass through the filter and come out clear, Boersen told AFP on Tuesday, speaking on the sidelines of a major two-day offshore energy conference in Amsterdam.

“一大管空气可以经过过滤器随后净身而出。”波尔森在周二于阿姆斯特丹举行的海洋能源会议的间隙告诉法新社记者。此次会议为期两天。

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For a low-pass filter, signals much longer than the time constant pass through unaltered while signals shorter than the time constant are filtered out.

对于低通滤波器，比时间常数更长的信号将会保持不变地通过，而比时间常数短的信号将会被滤掉。

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A filter is designed to reject some substances, while permitting others to pass through.

VOA: special.2010.01.05

UTC's solution: Pass the return air through an aluminum filter sprayed with titanium dioxide that, hit with ultraviolet rays, sets off a chemical reaction that breaks down nasty organic compounds like benzene and formaldehyde into carbon dioxide and water.

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