As for BOD5, a certain coefficient is needed to revise the measured values in order to restore the reduced fraction due to the sediment deposition.

对BOD5而言，应通过乘以某系数以恢复测量过程中受泥沙沉淀影响而降低的那部分数值。

youdao

In the internet age, at least in theory, this fraction can be much reduced.

在互联网时代，至少在理论上，这个比例可以大大降低。

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If, on waking one fine morning we were to find gravitation reduced to only a fraction of itself, would we still demurely walk along the high road?

假如我们在一个晴朗的早晨醒来，发现地心吸力减少到了一点儿，难道我们还会那么老实地行走在大路上？

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"I understand this was the longest continually operating mill in Scotland even though it had been reduced to a fraction of its former size, " he said.

BBC: Innerleithen's Caerlee Mills site faces closure fears

The worm can also cause severe itching under the skin, and it is hoped that cases can be reduced to only a fraction of previous levels.

BBC: Danger worms tracked from space

These innovative solutions entail reusing most of the water to frack additional wells so that ultimately, contaminated materials are reduced to a tiny fraction by volume so that it can be safely delivered to hazardous waste disposal facilities.

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