1. A burst of activity associated with the laying of submarine cables soon confirmed the Challenger´s observation that many parts of the ocean were two to three miles deep,
    铺设海底电缆的热潮很快证实了"挑战者"号的观察结果：海洋中很多地方可深达两三英里，

2. A succession of scientific studies of animals implies that physical activity has a positive effect on mental functioning.
    对动物的一系列科学研究表明，体育活动对智力的发挥有积极作用。

3. Yet, political activity among Kenyan women is not a new phenomenon.
    然而，肯尼亚妇女从事政治活动并不是什么新现象。

4. Second, the work of governments, organizations, and businesses has been followed by the very high activity of people — as singles, families, and communities.
    第二，除政府、组织和企业的努力之外,普通人民也积极参与其中--从个人、家庭到社区。

5. My particular experience is largely in oil, and the search for oil has done more to improve deep drilling than any other mining activity.
    我是专门搞石油的，寻找石油比其他任何采矿业对改进钻探作的贡献都要大。

6. (which is simply a device 10 for recording the electrical activity of the brain by attaching electrodes to the scalp) shows that while there is a change in the pattern of activity during sleep,
    显示，人在睡眠时大脑活动的方式有变化，

7. There is no evidence that the total amount of activity is any less.
    但没有迹象表明，其活动总量有任何减少。

8. It would be completely three dimensional, with many levels of activity.
    它将是完全立体化的，人们可以在许多层平面上从事活动。

9. Who recently published an article reviewing the scientific literature on activity's effect on the brain.
    他最近发表了一篇文章，评述有关运动对大脑的影响的科学文献。

10. Frequent computer analyses could tell whether workers, like air traffic controllers, are seeing all activity clearly enough to monitor it properly.
    采用频繁的电脑分析，能够了解到工作人员，如飞行调度员，是否对工作全局一目了然，从而做好各自的工作。