1. Convinced of the importance of education, modern states ´invest´ in institutions of learning to get back ´interest´ in the form of a large group of enlightened young men and women who are potential leaders.
    现代国家深深懂得教育的重要性，对教育机构投资，收回的1利息´便是培养出大批有知识的男女青年，这些人可能成为未来的栋梁。

2. The growth of knowledge followed a kind of compound interest law,
    因为知识的增长遵循着一种"滚雪球"的规律。

3. They aroused great interest at the time, they had important theoretical consequences, and they provided a striking demonstration of the potentialities hidden in instruments and apparatus.
    这些观察当时引起人们极大的兴趣，具有重要的理论意义，并充分显示出了仪表和仪器的潜在力量。

4. Leaning (靠) forward a little while a person is talking shows your interest and shows you are listening to what the person is saying.
    在别人说话时，你身体稍向前倾可以表明你的兴趣以及你在听他说话。

5. It is no use starting late in life to say: ´I will take an interest in this or that.´
    到了晚年才开始说："我会对这些人或那个人发生兴趣"，

6. I said that if he talked very long, his Russian listeners, not understanding what was said, would probably lose interest.
    我说如果他讲很长时间，而他的苏联听众们听不懂他的谈话，就很可能会失去兴趣。

7. Interest in teaching, social service and the humanities is at a low, along with ethnic and women's studies.
    如今人们对当教师、社会服务和人文学科、还有种族和妇女研究的兴趣都处于低潮。