We need to ensure that microbes aren't going to escape into the air or down the drain.

我们需要确保细菌不会从空气或排水管中逃脱。

youdao

He could run a hose down from the house, and, yes, he had put a hot-water line through the basement out to the back, and, in the dead of winter, with his 50 amp heater running and a drain in the middle of the concrete floor, he could wash his MG convertible, dreaming of tomorrow and his escape.

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