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		ef·fi·ca·cy AHD[ĕfʹĭ-kə-sē] D.J.[ˈefɪkəsiː]K.K.[ˈɛfɪkəsi]n.(名词)- Power or capacity to produce a desired effect; effectiveness.效验:产生预期效果的力量或能力;效力
 
 - Latin efficācia 拉丁语 efficācia 
 
 - from efficāx  efficāc- [efficacious] * see  efficacious 源自 efficāx  efficāc- [实验的] * 参见 efficacious
 
 
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