杆状菌

例句：

1. 1. The bacteria in the soil are responsible for decomposition.
   土壤中的细菌负责分解。
2. 2. Bacteria play a crucial role in maintaining the balance of ecosystems.
   细菌在维持生态系统平衡中起着关键作用。
3. 3. The study of bacteria has led to many breakthroughs in medicine.
   细菌研究在医学领域取得了许多突破。