1.
Earth s ecological debt and humankind s sustainable development challenges:analysis of WWF s Living Planet Report 2006;
地球的生态负债与人类的可持续发展挑战——WWF《生命行星报告2006》分析
2.
Does life exist on other planets?
别的行星上有生命吗？
3.
Life could not exist on a planet circling such a dead star.
围绕这样一颗无生命的恒星运行的行星上不可能有生命存在。
4.
How many of these planets would be able to support life?
这些行星中有多少适合于生命生存呢？
5.
It is probable that life animates all the planets revolving round all the stars.
生命为一切围绕恒星旋转的行星注入活力。
6.
a disease of frequent occurrence; the occurrence (or presence) of life on other planets.
其它的行星上也出现了生命。
7.
That planet is probably lifeless.
那颗行星上可能没有生命。
8.
But will life arise on such planets?
可是在这样的行星上能出现生命吗？
9.
Do you believe there is life on other planets?
你相信在其他行星上有生命存在吗？
10.
Life on other planets is a possibility.
其他行星上有生命是可能的。
11.
a lifeless planet, and to what lacks animation, spirit, or brightness(
无生命的行星)，和缺乏生气、精神或欢乐的(
12.
Consequently, there is a strong possibility that life can arise on other planets.
由此可见，其他行星上极可能有生命产生。
13.
Many of the planets are no doubt inhabited by some form of advanced life.
许多行星上不容置疑地存在着高级的生命形式。
14.
As far as we know,the earth is the only planet with life on it.
就我们所知，地球是唯一的有生命的行星。
15.
The recipe for creating life begins with a warm planet.
创造生命的秘诀最先要有一个温暖的行星。
16.
Another way, in which life could fail to develop to an intelligent stage, would be if an asteroid or comet were to collide with the planet.
从另一方面考虑，生命未能发展到具有智能的阶段，是否可能是小行星或彗星与行星发生了碰撞。
17.
Considering the rate at which planets form, perhaps one with conditions suitable for life forms in our galaxy each year.
从行星的生成率来看，或许在我们的星系中每年会形成一颗适宜于生命的行星。
18.
Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it,
反之，如果恒星很小，维持生命的行星就要在离恒星很近的轨道上运行，