Invisible as bacteria is, it digests and cleans dead body to produce fertilizer, playing important role in controlling the quantity of common animals.
英
美
- 细菌是一种看不见的东西,可是牠们在帮助消化、消灭死亡躯体、制造肥料,控制生物数量上也有其不可漠视的功能与贡献。