carbon cycling的用法和樣例：
例句
- Microbes and plants play substantial roles in the global cycling of carbon through the environment.
各種微生物與植物透過(guò)環(huán)境在全球總體碳循環(huán)中扮演重要角色。 - The carbon cycle has thus acquired another epicycle, and become even more complicated to understand than it was.
碳循環(huán)因此又得納入另一個(gè)亞循環(huán)，以致變得更加復雜難以理解。
