Trillions upon trillions of such iceballs got tossed around by the planets.

行星们抛来抛去的冰球已经有上万亿个之多。

This is composed of the iceballs sent by Neptune into those weird, highly tilted orbits.

这是由受海王星影响而被送入怪异、高度倾斜的轨道的冰球所组成的。

Repeated more distant encounters tended to more slowly increase the sizes of the orbits of the iceballs, too.

重复的更远距离的相遇会使冰球公转轨道的大小增长得更慢。

Neptune would have had the biggest effect on these iceballs, because it bordered the biggest volume of space where they lived.

海王星会对这些冰球产生最大的影响，因为它与这些冰球存在数目最多的空间相邻。

The dirty iceballs, we call comets, are a logical candidate for the source of our water, but were ruled out when we discovered that they are far richer in heavy hydrogen than Earth water.

肮脏的冰球，我们称之为彗星，是我们水之源的合理候选者，但当我们发现它们的重氢含量远比地球水丰富时，就被排除了。

As we'll learn in a future episode, there's a repository of giant iceballs out past Neptune, so Triton was probably one of those that got too close to Neptune and was captured by its gravity.

我们将在以后的章节中了解到，海王星附近有一个巨大的冰球储存库，所以海卫一可能是那些太靠近海王星并被其引力捕获的冰球之一。