| 单词 | once and again | 
| 释义 |  once /wons or wuns/adverb
 One time adjectiveFormer conjunction
 ORIGIN: OE ānes, orig genitive of ān one, used as adv   oncˈer noun 
 once-accentˈed adjective (music) Marked with one accent, applied to the octave beginning with middle C onceˈ-errand see errand once-for-allˈ adjective Done, etc, once and for all once-oˈver noun 
 all at once 
 at once 
 for once On one occasion only once again or once more One more time, as before once and again 
 once (or once and) for all Once only and not again once in a way or while 
 once or twice A few times once upon a time At a certain time in the past, the usual formula for beginning a fairy tale  | 
	
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