Phagus dubius

例句：

1. 1. The bacteria in the soil are constantly changing and growing.
   土壤中的细菌一直在变化和生长。
2. 2. The bacillus is a microscopic organism that can cause diseases.
   杆菌是一种微小的生物，可以引起疾病。
3. 3. Bacteria play an important role in the growth of plants and animals.
   细菌在植物和动物的生长中起着重要的作用。