16. Obviously, there would be no point in investing in a computer if you had to check all its answers, but people should also rely on their own internal computers and check the machine when they have the feeling that something has gone wrong.

　　17. Certainly Newton considered some theoretical aspects of it in his writings, but he was reluctant to go to sea to further his work.

　　18. For most people the sea was remote, and with the exception of early intercontinental travellers or others who earned a living from the sea, there was little reason to ask many questions about it , let alone to ask what lay beneath the surface.

　　19. The first time that the question “ What is at the bottom of the oceans?” had to be answered with any commercial consequence was when the laying of a telegraph cable from Europe to America was proposed.

　　20. At the early attempts, the cable failed and when it was taken out for repairs it was found to be covered in living growths, a fact which defied contemporary scientific opinion that there was no life in the deeper parts of the sea.

　　译文：

　　1、系好安全带能够挽救性命，它能将丧生和重伤的概率减少一半以上。

　　2、但是司机有责任确保14岁以下的孩子不要坐在前排，除非他们系好了安全带。

　　3、当然，如果有以下情况你可以不系安全带：你在倒车时，或者你用一种特殊交通工具进行当地的货物运送、收集时，或者你有合法的医学证明你不能系安全带时。

　　4、注意你如果不这么做（系安全带）的话，你有可能被告上法庭，而且你有可能被处以罚款除非你能证明你有不带安全带的理由。

　　5、Taiju Matsuzawa教授想找出为什么日本北部的健康农民在相对年轻的年龄就显得开始失去思考与推理的能力的原因以及怎样才能延缓老化过程。

　　6、在东京国立大学的同事们的帮助下，他开始对一千来自不同职业的人群进行了大脑体积的测量。

　　7、计算机技术帮助研究人员获得人脑前部和侧部的准确体积，这是与人的智能和情绪有关的部分，而且也决定人的性格特点。

　　8、有的人（大脑）前部和侧部的收缩——随着细胞的死亡——在三十多岁时就能被观察到了，但是也有些人直到六七岁依然不明显。

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