Noun:

1. an organism (especially a bacterium) that does not require air or free oxygen to live

anan.言论集；语录；轶事pref.向上；向后；再abbr.美国报业协会（=American Newspaper Association ）Anafu孔太

1. For example, a facultative anaerobe is an organism that can grow under anaerobic conditions but is also able to survive in aerobic conditions.
   例如，兼性厌氧微生物就是既可以生长在厌氧条件下也可以在有氧条件下存活。