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单词 obligately
释义 obligately, adv. Biol.|ˈɒblɪgətlɪ|
[f. obligate ppl. a. + -ly2.]
Out of necessity, because restricted to such a mode of life or such environmental conditions.
1952[see saprobe].1955New Biol. XVIII. 54 These nitrogen-fixing bacteria were found to differ strikingly in that Clostridium is obligately anaerobic, i.e. able to grow only in the absence of oxygen.1967Oceanogr. & Marine Biol. V. 194 An obligately psychrophilic marine bacterium.1971[see halophilic a.].1974Nature 18 Oct. 574/2 Whether a symbiotic association is mutualistic or obligately parasitic.
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