decomposer

例句：

1. 1. The soil is being decomposed by the microorganisms.
   土壤正在被微生物分解。
2. 2. The process of decomposing organic matter is called composting.
   将有机物质分解的过程称为堆肥。
3. 3. The decomposer bacteria play an important role in breaking down complex organic compounds.
   分解细菌在分解复杂有机物方面起着重要作用。