This material is what forms the comet's tail, but how that happens depends on which material you're talking about.

这种物质形成了彗星的尾巴，但它是如何形成的就要取决于你谈论的是哪种物质。

13. The comet's tail is beautiful.

13.彗星的尾巴很漂亮。

But the last one should have a comet tail on it.

但最后一个应该有一条彗星尾巴。

Her teeth were bared, her eyes shone like fire, and her long hair streamed out behind her like a comet's tail.

她龇牙咧嘴，双眼闪着火光，长长的头发像彗星的尾巴一样在身后披散。