| 1. | But we know that life on earth has had a long and diverse history .
但是，我们知道，地球上的生命具有很长很复杂的历史。 |
| 2. | A close look would be likely to suggest that the car is the most conspicuous type of life on earth .
稍近些观察，也许会以为汽车是地球上最明显的一种生命。 |
| 3. | Paleontologists have studied them since they began to document the history of life on earth .
古生物学家们一开始论述地球上的生物发展史时就接触到这个问题。 |
| 4. | Microbes are the oldest form of life on earth
微生物是地球上最古老的生命形式。 |
| 5. | There would be no life on earth without water
如果没有水，地球上将没有生命。 |
| 6. | How and where did life on earth arise
地球生物是怎样和在哪里起源的？ |
| 7. | Life on earth is short and uncertain
地面上的生命是短暂而不确定的。 |
| 8. | For life on earth - save our seas
为了地球上的生命-拯救我们的海洋 |
| 9. | Lives on earth have been exposed to
自古以来，地球上的生命便暴露于 |
| 10. | This life on earth is not the end
在这地球上的生命并不是尽头。 |
