| 单词 | sporadic | 
| 释义 | spo·rad·ic    (spə-rădĭk, spô-)adj. 1.  Occurring at irregular intervals or in isolated or scattered places; having no pattern or order: his sporadic attendance in class; rebels who put up sporadic resistance. See Synonyms at  periodic. 2.  Medicine   Not epidemic, endemic, or inherited. Used of a disease or condition: Most cancers are sporadic, caused by genetic mutations that are not heritable. [Medieval Latin sporadicus, scattered, from Greek sporadikos, from sporas, sporad-; see  sper- in the Appendix of Indo-European roots.] spo·radi·cal·ly adv. spo·radi·cal·ness n.  | 
	
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