1. He is optimistic that once parents make a commitment to the program, they will be daily role models for their children, unlike parents whose children are in boarding schools.
    他很乐观地相信，一旦家长们投入到计划当中，他们就会成为孩子们日常行为的榜样，这一点与寄宿学校的学生家长完全不同。

2. And we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
    我们只要看一看蝙蝠回声定位这一极不寻常的发现，就可以探究一下声音在什么情况下有绝对的实用价值。

3. A famous actor in a highly successful play was once cast in the role of an aristocrat who had been imprisoned in the Bastille for twenty years.
    有一位名演员曾在一出极为成功的剧目中扮演一个贵族角色，这个贵族已在巴士底狱被关押了20年。

4. Actually the biggest threat to the traditional image and role of police officers does not come from guns and armed crime but the increase in the tasks we expect the police to carry out.
    实际上，对传统警察形象、职责的最大威胁并非来自枪支和武装犯罪，而是来自我们要求警察做的日益增多的工作。

5. She was intended to play a leading role in the growing might of Sweden.
    目的就是要在不断增长的瑞典势力中起主导作用。

6. She acted the role of the perfect servant for three years before Aunt Harriet discovered her ´little weakness´.
    她担任"理想仆人"角色3年之后，哈丽特终于发现她有"小小的弱点"。

7. Plomin's method makes use of new gene mapping techniques and promises to provide direct evidence of the role that genes play.
    普罗明的方法利用新的基因图谱技术，有望对基因所起的作用提供直接证据。

8. Many officers believe it is all these extra duties, rather than the fear of being shot, that have really changed their role.
    很多警员认为正是这些额外工作，而不是担心被枪击，才改变了他们的职责。

9. Gore wants the federal government to play the leading role in shaping the superhighway.
    戈尔希望联邦政府在决定信息高速公路的发展方面发挥领导作用。

10. Certainly industry has played a significant role in destroying natural areas, generating pollution and using up resources.
    在破坏自然环境、制造污染和消耗能源方面，工业固然起了主要作用，但是我们才是授意者：