heterotrophic cycle

例句：

1. 1.The heterotrophic cycle is a crucial part of the ecosystem.
   异养循环是生态系统中至关重要的部分。
2. 2. The bacteria in the soil are responsible for breaking down organic matter and recycling nutrients.
   土壤中的细菌负责分解有机物质并回收养分。
3. 3. The heterotrophic cycle helps to maintain the balance of the ecosystem.
   异养循环有助于维持生态系统的平衡。