准备食物前一定要洗手，以免传播细菌。

Always wash your hands before preparing food to avoid spreading ___germs.

定期清洁有助于减少家居环境中的细菌数量。

Regular cleaning helps to reduce the number of household ___germs.

细菌和病菌是可能导致疾病的微生物。

Bacteria and ___germs are microscopic organisms that can cause illness.