然而，这些细菌持续存在的疗效尚未清楚。

It is still unclear, however, if such bacterial persistence will increase or decrease therapeutic effects.

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将该方法应用于大肠杆菌（一种泌尿系统感染的常见病原菌），研究者们在两小时内就清除了99.9%的原先持续存在的细菌。

Testing the strategy on Eschericia coli (E. coli) bacteria, a common cause of urinary infections, the researchers were able to eliminate 99.9 per cent of persisters within just two hours.

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