purple nonsulfur bacteria

例句：

1. 1. The purplenonsulfur bacteria are responsible forthe color of the flowers.
   紫色非硫细菌负责花朵的颜色。
2. 2. The purple nonsulfur bacteria play a crucial role in maintainingsoil health.
   紫色非硫细菌在维护土壤健康方面起着至关重要的作用。
3. 3. The purple nonsulfur bacteria are often found inhot springs and other natural environments.
   紫色非硫细菌通常在温泉和其他自然环境中被发现。