这样，我们为下水道和河流中出现的抗药性细菌创建了一个理想的环境。
In this way, we have created an ideal environment for the emergence of antibiotic-resistant bacteria in our drains and sewers.
然而，在下水道里，这些化学药品被稀释，细菌对它们产生了抗药性。
However, in sewage, these chemicals become diluted and bacteria have evolved resistance to them.
在你们家里的下水道有超过每平方厘米的77.500细菌。
Over 77,500 bacteria per square centimeter can live in your sink drain.
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