音标：[,efi'keiʃəs] ；

efficaciousness
n.
efficacious的变形
efficacious
[,efi'keiʃəs]
adj.
(能)产生预期效果的，有效能的，有效验的，灵验的
近义词:
effective

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anchor ice

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angermanalven (angerman r.)

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