COD不是细菌控制的关键因子。

COD wasn't the key factor of microbial control.

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结果表明，投加常规杀菌剂既能达到对细菌控制的要求。

The result showed that general bactericide meets the needs of controlling bacteria.

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尽管研究者们没有准确测量健康收益的多少，他们的发现被越来越多的证据证实，肠道细菌控制着重要免疫功能。

Though the researchers did not measure health outcomes directly, their findings arrive amid growing evidence that gut bacteria control important immune functions.

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