The closed back purge system and the condition of aerating turbulent flow can lighten the attenuation of membrane flux, at the same time, prevent the problem of nitrification inhibition.

通过密闭反冲洗系统、曝气紊流条件，可有效缓解膜通量的衰减，同时防止反应器内硝化抑制作用的产生。

youdao

They closed the door and came back. They seemed to be getting ready to leave.

VOA: special.2009.07.04

I left the lights on, closed the door and went back to my apartment.

VOA: special.2009.07.25

The case dates back to the 1990s when Mr.Gul was a senior member of the Islamist Welfare party which was closed by the constitutional court.

VOA: standard.2009.05.20

And if that were possible, could the modified DNA molecule then be closed back up?

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The following week, AAPL closed back above the quarterly pivot level, suggesting that the intermediate-term uptrend was still intact.

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The weekly on-balance volume (OBV) tested support, line d, on the correction and closed back above its WMA last week.

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