Microchaete

例句：

1. 1.Microchaetes are the smallest living organisms on Earth.
   微生物是地球上最小的生命体。
2. 2.The discovery of new microchaete species has revolutionized our understanding of life on earth.
   发现新的微生物物种已经改变了我们对地球上生命的理解。
3. 3. Microchaetes play a crucial role in the ecosystem by breaking down organic matter.
   微生物在生态系统中通过分解有机物质发挥着关键作用。