panspermia

The confirmation of Mars-Earth panspermia would suggest that life, once started, could readily spread within a star system.

「火星–地球」胚种说如获证实，表示生命一旦出现，便能星系内扩散。

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，最受人讨论的胚种说就是：微生前驱，是从火星送到地球的。