Commonly used filter aid agent diatomite, have fibrin.

常用的助滤剂有硅藻土，纤维素等。

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The gravel filter is the most commonly used filter in all countries nowadays.

砾石过滤器是当今各国最常使用的过滤器型式之一。

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He then fashioned the anode and cathode of his battery from the stuff. For the electrolyte, he used filter paper soaked in brine.

他把这种合成物制成新电池的两极，用浸过盐水的滤纸作为电解质。

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The ratings can then be used to filter the type of people you want to chat with in the future.

FORBES: Chatroulette Starts Blurring Video As A Filter For Objectionable Content

Another has perfectly arrayed pores 3 nanometers across, a mesh so fine it is used to filter individual amino acids in the DNA sequencing process.

FORBES: The Science of Small

We're losing the buffer that used to filter the Mississippi's waters.

CNN: Your e-mails: 'Clean up our wetlands'