As we have shown, panspermia is plausible theoretically. 一如我们所述，胚种说的立论看似合理。
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。
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。
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。
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。
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。
