1. As people work to control the planet and make life comfortable, are they using up resources that are needed for their survival?
    难道为了控制整个地球，为了使生活舒适，人类就要用尽生存所需的所有资源吗？

2. Such a messenger, receiving our radio and television signals, might well re-transmit them back to its home-planet,
    这种自动化信息装置，在接收到我们的无线电和电视信号后，完全有可能把这些信号发回到原来的行星。

3. Pluto is the farthest planet in the solar system.
    冥王星是太阳系中最远的行星。

4. Pollution is the price we pay for an overpopulated, over industrialized planet.
    污染就是我们为这个人口过密，过度工业化的星球所付出的代价。

5. People are only a very small fraction of all the living things on the planet.
    人类只是这个星球上所有生物的一小部分。

6. So that we would be able to ´see´ the planet properly and analyse its atmosphere.
    这样我们就能彻底"看见"这颗行星，并分析它的大气层。

7. Rubbish, however, is only part of the problem of polluting our planet.
    然而，垃圾只是我们这个星球的污染问题的一个方面。

8. Once we detected a planet, we would have to find a way of blotting out the light from its star,
    一旦我们找到这样一颗行星，我们就要想办法将它的恒星射过来的光线遮暗，

9. One thing is certain -- the balance of nature on this water planet is easily upset.
    有一点是可以肯定的- 这个有水的行星上的自然平衡是十分脆弱的。

10. Over that time, it is widely believed, 99 percent of all species have come and gone, while the planet has remained.
    这期间，99%的物种生生死死，唯独地球依然存在，这一点已成共识。