医生建议勤洗手以防止有害微生物的传播。

Doctors recommend washing hands frequently to prevent the spread of harmful ___microbes.

制作酸奶需要特定的微生物来发酵牛奶。

Making yogurt requires specific ___microbes to ferment the milk.

这些微生物帮助分解落叶，使土壤更肥沃。

These ___microbes help break down fallen leaves, making the soil more fertile.