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You use them wrongly, they can kill more than they can save.

一旦使用上出现错误，它们就会杀死比救助人数更多的人。

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Conclusion Two disinfection methods can both kill bacteria at appropriate temperature and time, but can't destruct antibody, and microwave method can save more time and energy.

结论两种消毒方法均可在相应温度和时间内杀灭细菌且不破坏抗体，但微波消毒法更节省时间和能源。

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Defra officials gently pointed out that perhaps the "kill-a-cow, save-the-world" policy might have a few flaws.

BBC: Whitehall turf war saves cows' hides

Zaluska had to pull of a smart save from Brittain's long-range effort as Adams' side looked to kill off Celtic's challenge.

BBC: Celtic 0-2 Ross County