In a gas mask designed to guard against a biological threat, a very fine particulate filter is useful.

预防生物威胁时，优良的微粒过滤器对防毒面具非常有用。

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We used to filter and the kinds of six, but the type or a lot of. Through the fine collocation can achieve the best effect to express.

我们常用的滤光镜的种类也就六种，但其种类还是很多的。通过精细搭配就可以实现想要表现的最佳效果。

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The remaining two attributes, filter and systemId, enable more fine-grained control of the parsing.

其它两个属性filter 和 systemId 可以实现对分解流程的精确控制。

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Filter material: layer of fine gravel used in slope stabilization structures that allows water to escape and retains soil particles.

UNESCO: L O S S A R Y

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

In humans the vocal tract acts as a filter on the sound from the source, and the "source-filter theory" held that the separate, fine control of the vocal tract to be the product of a long evolution in the development of the subtleties of speech.

BBC: Helium-huffing gibbons 'sing with soprano technique'