bacterium的解释
n. 细菌
bacterium的例句
Movement of an organism, especially a bacterium, toward or away from air or oxygen.
趋氧性有机体，特别是细菌移向或离开空气或氧气的运动

An organism, such as a bacterium, requiring oxygen to live.
好氧菌需要氧气生存的有机体，例如细菌