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bacteria

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Some drugs kill off useful bacteria in the user's body.(某些药物会杀死服用者体内的有益细菌。)
Bacteria feed on this oil and release hydrogen sulfide gas.(细菌以这种油为食，并释放硫化氢气体。)
When a carpet was contaminated, less than 1% of the bacteria were transferred.(当地毯被污染时，只有不到1%的细菌能被转移。)
The bacteria are harmless to humans.(这些细菌对人无害。)
Even if bacteria did arrive on Earth from Mars, they must have died out.(即使细菌真的从火星来到地球，它们也一定已经灭绝了。)
Bacteria remain in the body.(细菌留在了人体内。)
It is possible to multiply these bacteria in the laboratory.(在实验室里繁殖这些细菌是可能的。)
Biofilm communities can harbor bacteria longer and are very difficult to clean.(生物膜群落容纳细菌的时间可以更长，而且很难清洗。)
Parts of the shop were very dirty, unhygienic, and an ideal breeding ground for bacteria.(商店的一些地方非常不卫生，是细菌滋生的理想之地。)
To find out, we introduced bacteria to squares of tile, carpet or wood.(为了找到答案，我们把细菌植入了正方形的瓷砖、地毯或木头中。)

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