那么讲到流星体从何而来，我们就需要讨论下彗星和小行星。

So to talk about where meteorites come from, we need to talk about comets and asteroids.

youdao

我现在不打算深入讨论彗星和小行星了，但是我们稍后会再回到这个点上，讨论这方面的内容。

I'm not going to go into any depth on comets and asteroids now, but we'll come back later and do that.

youdao

如果外太空司把近地天体(如彗星和小行星)当成“近地物体”的话，那么这个说法才可以说得通。

This cannot be correct unless Unoosa considers aliens to be near-earth objects (like comets and asteroids).

youdao