facultative anaer的用法和样例：
例句
- The effects of Eimeria tenella infection on the population of some facultative anaerobic flora were studied.
兼性厌氧菌是鸡盲肠中共生微生物菌群的重要组成部分。 - Facultative anaerobes, because of their indifference to the presence or absence of oxygen, exhibit growth throughout the medium.
对于兼性厌氧菌来说，因为他们对于有或没有氧气都没有差别，因此在培养基中到处都有生长。
