translation.en: You'll find millions or trillions or billions of objects which, in what we call the Kuiper Belt or the Oort Cloud -- these are clouds of small objects which appear as comets when they fall close to the Sun. Mostly, they just live out there but they are biologically very interesting indeed, because they consist primarily of ice with other minerals, which are just the right ones for developing life.
translation.zh: 你会在柯伊伯带或奥尔特星云中间 发现几百万乃至几十亿个物体 这些是云状的小物体 当它们飞向太阳的时候 看起来就像彗星 它们大多时候就呆在这个远离太阳的地方 但是从生物学上来说 它们是很有意义的 因为它们大都由冰层以及其他的矿物组成 这正是生命得以发展的要素