Watch a comet, where is it going?
观察一颗彗星，它将往何处去？
它是一颗彗星吗？
This has never been seen before in a comet-like object.
这种景象从未在类似彗星的观测过程中出现过。
This was the first time ocean-like water was detected in a comet.
这是首次在彗星上检测到有海洋般的水。
Then, suddenly, an idea, shining and new, flashed like a comet through her brain.
接着，一个崭新的念头像颗彗星似的突然在她脑子里掠过。
你看见过彗星吗。
In that way, Pluto ACTS like a comet.
也就是说，冥王星的行为像一个彗星。
How do you find a comet in the sky? How do you spot one?
你是如何在天空中发现彗星、辨认彗星的？
A comet is an icy body that releases gas or dust.
彗星是一个释放着气体和尘埃的冰质天体。
A comet is an icy body that releases gas or dust.
彗星是一个释放着气体和尘埃的冰质天体。
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