1. But on the general effectiveness of the social cure, Rosenberg is less persuasive. 但是在社会疗法的普遍有效性的问题上，罗森博格反倒没有那么令人信服。
2. There's solid evidence that there are huge differences in the effectiveness of teachers. 有确凿的证据表明，教师的工作效率存在巨大差异。
3. As a general rule, it's important to differentiate between effectiveness and absolute time commitments. 一般说来，区别效率和绝对的时间投入很重要。
4. FDA can ask for the proof of safety and effectiveness of a product if its distributors challenge FDA's authority. 如果经销商对FDA的权威提出质疑，FDA可以要求他们提供产品安全性和有效性的证明。
5. One advocate believes that many other benefits should be taken into consideration when we assess the cost-effectiveness of grass-fed farming. 一位倡导者认为，当我们评估草饲农业的成本效益时，应该考虑许多其他好处。
