| 单词 | biological imperative | 
| 释义 | > as lemmasbiological imperative   biological imperative  n. an instinct or behaviour which is essential for the survival of an individual or species; esp. the urge to procreate. ΚΠ 1903    L. F. Ward Pure Sociol.  ii. xiv. 358  				The..universal sense of the advantage of crossing strains..[and] the charm of sexual novelty, both of which motives are equally products of the biological imperative. 1925    R. Mukerjee Borderlands Econ. xvi. 247  				Work is a biological imperative: it is work which..ensures mutual evolution among organisms. 1981    Times Lit. Suppl. 14 Aug. 941/2  				The basic biological imperatives of feeding, fighting, fleeing, and sexual intercourse. 2018    Toronto Star 		(Nexis)	 6 Feb.  e1  				The biological imperative can't always be denied, especially for women who are constantly being reminded of their fertility. < as lemmas  | 
	
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