panspermia

panspermia

1. As we have shown, panspermia is plausible theoretically.

一如我们所述，胚种说的立论看似合理。

2. One hypothesis is panspermia, which suggests that ‘seeds of life’ exist everywhere around the universe, and that life on earth started when these ‘seeds’ came here, probably by a meteor.

一种假设是胚种论，它认为宇宙到处存在“生命的种子”，地球上之所以开始有生命是因为这些“种子”到达了地球，可能是随着流星而来。

3. But other parts of the panspermia hypothesis are harder to pin down.

不过，胚种说的其他部份则较难论定。

4. For this reason, the most commonly discussed panspermia scenario involves the transport of microbes or their precursors from Mars to Earth.

基于这个理由，最常受人讨论的胚种说就是：微生物或其前驱物，是从火星送到地球的。

5. In its modern form, the panspermia hypothesis addresses how biological material might have arrived on our planet but not how life originated in the first place.

时至今日，胚种说讨论的重点，是生物体如何抵达我们所居住的行星，而不再是生命如何在其发源地发生。

6. Ultimately, scientists may not be able to know whether and to what extent panspermia has occurred until they discover life on another planet or moon.

最后，科学家在其他行星或月球上发现生命之前，可能无从得知胚种说是否曾经发生以及发展至何种程度。

7. For panspermia to occur, however, microorganisms need to survive not only ejection from the first planet and atmospheric entry to the second but the interplanetary voyage itself.

然而，胚种说真要发生，微生物除了从第一颗行星喷发、进入第二颗行星的大气时必须幸存之外，还要能在整个行星际旅程中保住小命。

8. Because it is not possible at this time to quantify all the steps of the panspermia scenario, investigators cannot estimate how much biological material or how many living cells most likely arrived at Earth's surface in a given period.

由于当前无法量化胚种说情境中的所有步骤，研究人员无法估计某特定时期内，可能有多少生物体或活细胞抵达地球表面。

9. Researchers plan to evaluate the likelihood of panspermia by studying whether microorganisms can survive an interplanetary journey.

研究人员打算研究：微生物是否可以在星际旅行中存活，并据以评估胚种说存在的可能性。

10. The panspermia hypothesis posits that living cells or their precursors could have emerged on another planet or moon billions of years ago and hitched a ride to Earth on a meteorite.

胚种假说”假设：活细胞或其前驱物可能于数十亿年前发源自其它行星或月球上，并且搭陨石的便车来到地球。

11. -> "Panspermia From Venus?Probably Not.By Charles F.

至今寻找到跟地球一样环境的行星? 有?

12. This new understanding of life's origins has transformed the scientific debate over panspermia.

这种对生命起源的全新领略，已使科学上关于胚种说的议论改观。