兼性细菌能在有氧和无氧的条件下适应生长和代谢的细菌。一般以有氧生长为主，有氧时靠呼吸产能；兼具厌氧生长能力，无氧时通过发酵或无氧呼吸产能。
... facultative insurance 临时保险 facultative bacteria 兼性细菌 ; 适应性细菌 facultative aerobes 兼性好氧菌 ...
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项目名称：利用兼性自养氢细菌将二氧化碳转化为生物燃料。
Official Name: Bioconversion of Carbon Dioxide to Biofuels by Facultatively Autotrophic Hydrogen bacteria.
所有光合细菌加上各种兼性的好氧生物和绝对的厌氧生物具有这种能力。
All the photosynthetic bacteria possess the capability in addition to various facultative aerobes and obligate anaerobes.
兼性寄生的能在不同环境条件下活动的。用于某些生物，如细菌在有氧或无氧条件下都能生存。
Capable of functioning under varying environmental conditions. Used of certain organisms, such as bacteria that can live with or without oxygen.
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