adj. facultative
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.
大肠菌群是指需氧和兼性厌氧的革兰氏阴性无芽孢杆菌。
The coliform group referred to the aerobic or facultative anaerobic gram-negative budless bacillus.
兼性异染色质是在特定细胞发育命运中可能具有转录活性的异染色质。
Facultative heterochromatin is the heterochromatin that may become transcriptionally active in specific cell development fates.
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