efficaciousadj.
英 ,efɪ'keɪʃəs | 美
中文adj. 有效的；灵验的
词根词源
efficaciousefficacious: see effectefficacious (adj.)"sure to have the desired effect" (often of medicines), 1520s, from Latin efficaci-, stem of efficax "effectual, powerful" (see efficacy) + -ous. Related: Efficaciously; efficaciousness.
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