科学家们在争论一颗小行星是否要撞上地球。
Scientists were debating whether an asteroid was about to hit the Earth.
这意味着它们最有可能来自一颗小行星。
苏菲知道这个世界只是宇宙中的一颗小行星。
Sophie knew that the world was only a small planet in space.
实际上，至少有一颗小行星是用动态控制拍摄的马铃薯。
At least one asteroid is, in fact, a potato filmed using a motion control camera.
在那段时期的中间，也就是三叠纪时期，一颗小行星撞击了地球。
About halfway through that period, known as the Triassic, an asteroid struck Earth.
这颗小行星是在一次例行检查中被一颗卫星发现的。
The asteroid was first spotted during a routine survey performed by a satellite.
你将会检查它是否是一颗已知的小行星吗？
那是一颗文明程度非常高的小行星。
今天，一颗体积相当于9艘远洋邮轮的小行星将接近地球。
An asteroid, the size of nine ocean liners will pass close to earth today.
今天，一颗体积相当于9艘远洋邮轮的小行星将接近地球。
An asteroid, the size of nine ocean liners will pass close to earth today.
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