asteroids

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

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。

Roids are, for the most part anyway, they are just smaller bits of asteroids and comets.

在很大程度上，Roids 只是小行星和彗星的小碎片。

Rubin suggests that asteroids´ heat could have derived from collisions between asteroids.

鲁宾认为，小行星的热量可能来自小行星之间的碰撞。

Earth´s crust contains very little of this element, but most asteroids contain a lot more.

地壳中含有的这种元素很少，但大多数小行星上的要多得多。

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

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。