n.功效，效力
inefficacy───n.无效；无效力
effeminacy───n.柔弱，娇气（特指女人）
efficiency───n.效率；效能；功效
inefficacity───影响
pervicacy───任性
efficacious───adj.有效的；灵验的
delicacy───n.美味；佳肴；微妙；精密；精美；敏锐，敏感；世故，圆滑
efface───vt.抹去，抹掉；使自己不受人注意
effierce───埃菲尔切
Firms are now studying how genes interact, looking for correlations that might be used to determine the causes of disease or predict a drug's efficacy.───公司正在研究基因是如何相互作用的，以此寻找可用来判断疾病的起因或者预测药物功效的基因相关性。
Ciliv is selling the efficacy of so-called build-operate-transfer (BOT) operations.───瑟利夫正在大力宣扬被称之为“建设—经营—移交”（BOT) 模式的效力。
Recent medical studies confirm the efficacy of a healthier lifestyle.───近来的医学研究证实了更健康的生活方式的功效。
It's very exciting progress, but the efficacy to date is not that of, say, a measles vaccine, which is expected to be at least 90%.───这是非常令人振奋的进展，不过迄今效果并未达到麻疹疫苗的保护水平（麻疹疫苗的保护率预计超过90%）。
The self-limiting nature of adhesive capsulitis complicates the discussion of the efficacy of any treatment method in the long term.───讨论对于自我限制的并发性粘连囊炎使用任何治疗方法的长期疗效。
He said the test might be more useful for assessing the efficacy of vaccination programmes.───他说这种测试可能对于评估疫苗接种的效果更加有用。
Secondly initial intensity yield at any rate to efficacy the days to come and products is all-important.───其次初始强度的高低对今后生产效率及制品的合格率至关重要。
The euro zone's crisis has tested the efficacy of these European rules and led Germans to ask why they should pay when others break them.───欧元区的危机检验了欧盟法律条例的效力也引发德国人疑问，为什么当德国受到邻国财政上的削弱时德国应该去讨腰包。
It seems to me that theory encourages a measure of suspicion about the efficacy of speech that which is spoken as true in three ways.───就我看来，好像理论的存在鼓励了，对于话语有效性的质疑，也就是对被描述为真实的质疑，在三个方面有所表现。
The most commonly cited reasons for stopping the treatment were lack of efficacy and side effects.