1. 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。
2. 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。
3. 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。
4. The milky tea has high nutritive value, various flavors and has the efficacy of clearing heat and detoxicating and reliving summer heat and water retention. 奶茶营养价值高、口味多样，并具有清热解毒、消暑利水的功效。
5. A recent study suggests that vitamin E supplements, despite widespread belief in their efficacy, are no better than sugar pills for delaying the onset of the degenerative disease. 最近的一项研究表明，尽管人们普遍相信维生素 E 补充剂的功效，但在延缓退行性疾病发病方面，维生素 E 补充剂并不比糖丸效果更好。
