1. That given a planet only approximately like our own, life is almost certain to start.
    如果设想有一颗行星和我们地球的情况基本相似，那几乎肯定会产生生命。

2. The message to its home planet is barely halfway there.
    那么这个信号在发回到原来的行星途中刚刚走了一半路程。

3. It is a world of red sandy deserts (hence its name----the Red Planet), cloudless skies, savage sandstorms, chasms wider than the Grand Canyon and at least one mountain more than twice as tall as Everest.
    这是一个红色沙漠的世界（因而得名：红色行星），无云的天空，凶猛的沙暴，比大峡谷还宽的裂缝，起码有一座山有珠穆朗玛峰的近两倍高。

4. It is impossible to look for life on another planet using earth-based telescopes.
    使用放置在地球上的望远镜是无法观察到其他行星的生命的。

5. If we were able to discover lowly forms of life like bacteria on another planet, it would completely change our view of ourselves.
    如果我们能够在另一颗行星上找到诸如细菌的那种低等生命，那么这个发现将彻底改变我们对我们自己的看法。

6. It is the reason people can live on this planet.
    水是人们能在这颗行星上生存的根本。

7. In spite of rapid population increase and industrial growth, some groups of people, often in remote areas, have been able to live in harmony with the planet.
    尽管人口在迅速增长，工业发展很快，还是有一些人类群体——常常是居住在偏远地区的人们——能与地球和睦共处。

8. First of all, they may have come to this planet of ours thousands or millions of years ago,
    首先，他们可能在几千年前或几百年前已来过我们地球，

9. For most of the earth´s history they have been the only form of life on our planet.
    在地球上发展的大部分进程中，细菌是地球上唯一的生命形式。