| 正面 | 6366.efficacy 英 ['efɪkəsɪ]美 ['ɛfɪkəsi]     |
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| 背面 |     释义： 1. ef- "out" + fic- + -acy. 在这里取 out 的引申义：完成、结束(finish, end)之意。2. meaning: 事情做完了，事情做结束了. => work out, accomplish.3. => 引申为：事情做完、做结束后的效果。=> 效果、功效。n. 功效，效力 例句： 1. Recent medical studies confirm the efficacy of a healthier lifestyle.最新医学研究证实了较为健康的生活方式的好处。 efficacy 功效ef-, 向外。-fic, 做，词源同fact, effect. efficacy (n.)1520s, from Latin efficacia "efficacy, efficiency," from efficax (genitive efficacis) "powerful, effectual, efficient," from stem of efficere "work out, accomplish" (see effect (n.)). Earlier in same sense was efficace (c. 1200), from Old French eficace (14c.), from Latin efficacia; also efficacite (early 15c.), from Latin efficacitatem." |