However, in sewage, these chemicals become diluted and bacteria have evolved resistance to them.

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。

youdao

However, in sewage, these chemicals become diluted and bacteria have evolved resistance to them.

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。

youdao