1. No one on earth ever had a greater chance for glory.
    世界上再没有什么人有过比此更大的争取荣耀的机会了。

2. Housing developments and shopping centers cover much of the Earth with paved and concrete surfaces.
    住宅区和购物中心使地球上许多地方的表面都铺上了混凝土。

3. Despite their short time on Earth, however, people have brought about enormous changes to the surface of the planet — changes far out of proportion to the interval of time they have occupied it.
    然而，尽管在地球上的时日尚短，人类却已给地球表面带来了巨大的变化——这些变化与人类占据地球的短暂时间相比，是远远不成比例的。

4. 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。

5. 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。

6. 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。

7. 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。

8. 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，

9. 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。

10. 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。