该想法并不是认为这些结构单元只是搭乘陨石的乘客，而是小行星和彗星中的化学成分实际上可以制造生物的结构单元。
The idea isn't that these building blocks are just passengers aboard meteorites, but that the chemistry inside asteroids and comets can actually manufacture the essential building blocks of biology.
大多数古生物学家同意那些生物和剩下大部分的中生代生物都是在六千五百万年前地球和一颗小行星或者彗星相撞时灭绝。
Most paleontologists agree that those creatures and much of the rest of Mesozoic life ended when the Earth collided with an asteroid or a comet 65m years ago.
他像从外星骑着彗星尾巴乘风而来落在她巷子口的什么生物。
He was like some star creature who had drafted in on the tail of a comet and dropped off at the end of her lane.
他像从外星骑着彗星尾巴乘风而来落在她巷子口的什么生物。
He was like some star creature who had drafted in on the tail of a comet and dropped off at the end of her lane.
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