Scientists were debating whether an asteroid was about to hit the Earth.

科学家们在争论一颗小行星是否要撞上地球。

《柯林斯英汉双解大词典》

An asteroid could have annihilated the USA—and I wouldn't have heard the news for hours.

一颗小行星可能已经把美国毁灭了——而我可能几个小时内都没有听说这个消息。

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Astronomers have detected an asteroid not far from Earth, moving in the same orbit around the Sun.

天文学家在距离地球不远处发现一颗小行星，它与地球在同一轨道上围绕太阳运行。

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In two thousand eight Norway opened a so-called doomsday vault designed to be secure from any threat -- even an asteroid strike.

VOA: special.2010.08.24

Knowing more about how the Yarkovsky effect changes an asteroid's orbit will help scientists better predict whether RQ36 will come near Earth.

VOA: special.2011.06.22

"We will start by sending astronauts to an asteroid for the first time in history.

VOA: special.2010.04.28

Did an asteroid hit it, blasting the greater part of its atmosphere into space?

NEWYORKER: The Martian Chroniclers

That could happen again, with the economic equivalent of an asteroid coming out of the blue.

FORBES: Anticipate the V

We are more likely to win the lottery twice than to be hit by an asteroid.

FORBES: What Can NASA Do To Stop An Asteroid From Hitting Earth?