由医生从导的该项研究与厂商没有任何关系，只是为了深入研究细菌和清除细菌而做基础性的工做。

The study, designed by doctors with no ties to the company, was an effort to lay the groundwork for future research on germs and ways to get rid of them.

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在一种叫做翻瓣术的手术，牙周病医师翻起牙龈组织，清除细菌，保证组织回到原位置，让它和牙齿贴合更紧密。

In one technique, called pocket depth reduction, the periodontist folds back the gum tissue, removes the bacteria, and secures the tissue into place so that it fits more tightly around the teeth.

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当我们的太阳后来温度变得更高时，早期细菌持续清除大气中的二氧化碳和甲烷，使地球的气候不至于变得太热而无法维持生命的存在。

When our Sun later became hotter, the continued removal of atmospheric carbon dioxide and methane by early bacteria kept Earth's climate from becoming too hot to sustain life.

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your innate immune system tries to get rid of them.

你的先天性免疫系统试着去清除细菌

耶鲁公开课 - 生物医学工程探索课程节选