| 释义 |
facultative美 ['fækəlˌteɪtɪv] 英 ['fækəltətɪv] - adj.【生】兼性的；特许的；任意的；能力上的
- 网络兼性菌；兼氧性生物；兼性寄生的
adj. | 1. optional, not obligatory 2. enabling or capable of permitting something to happen or be done, but not able to force its occurrence 3. able to live or take place under a range of external conditions |
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