1. As Earth wellers, we always cherish the hope that we will be visited by little green men and that we will be able to communicate with them.
    作为地球上的居民，我们总存有这样的希望：小绿人来拜访我们，而我们可以和他们交流。

2. As the earth travels round, first one pole and then the other is tilted towards the sun.
    地球公转时，两极交替着斜向太阳。

3. And we think that the earth´s crust is very uneven indeed.
    我们于是认识到地表确实是起伏不平的。

4. Actually, even with its highest mountains and deepest oceans, the earth is as smooth for its size as a rubber ball.
    实际上，地球上尽管有高耸入云的群山和深不可测的海洋，但是由于本身太大了，所以相比之下，地球仍可以说光滑得像个橡皮球。

5. And all around the earth is a blanket of air, many miles thick.
    地球四周是一层许多英里厚的空气，

6. And days do not fit evenly into years, since the actual journey of the earth round the sun takes 365 days, 5 hours, 49 minutes and 46 seconds.
    而且天数也无法平均地分配到年中，因为地球绕太阳转一圈的实际航程需要花费365天5小时49分46秒。

7. And months do not fit evenly into years either, since the moon travels round the earth between 12 and 13 times in a year.
    月份也无法平均分配到年中，因为月亮一年中要围绕地球转12次到13次。

8. "Peace on earth begins at home."
    "人间平安，始于家庭。"

9. And upsetting the natural water cycle (循环) on Earth makes significant problems for its inhabitants.
    扰乱地球上水的自然循环会对它的居民造成严重问题。

10. Although scientists still cannot predict earthquakes, they are learning a great deal about how the large plates in the earth's crust move, the stresses between plates, how earthquakes work, and the general probability that a given place will have an
    尽管科学家们仍无法预测地震，但对地壳中的大板块如何移动，板块间的压力如何，地震如何发生，某地区发生地震的一般概率为多少，他们正了解得越来越多。