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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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