| 单词 | efficient | 
| 释义 | Word Frequency efficient(ɪˈfɪʃənt) adjective 1.  functioning or producing effectively and with the least waste of effort; competent  2.  philosophy producing a direct effect; causative  Derived forms efficiently (efˈficiently) adverb Word origin C14: from Latin efficiēns effecting | 
	
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