If an alien race is not interested in taking over the Earth but very interested in wiping out human beings all they have to do is enter orbit, and drop rocks.

如果一个外星种族对接管地球不感兴趣，但就想消灭人类，他们所要做的不过是进入轨道，朝地球扔岩石罢了。

youdao

SPACE technology has been a sinew of military power ever since the Soviet Union shocked America into the space race when it launched Sputnik 1 into orbit 51 years ago.

51年前苏联将1号人造地球卫星发射上轨，此举使美国大为震惊并引发了太空竞争；

youdao

It is true that the Soviets won some of the early heats of the space race, including being the first to put a man into orbit.

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And after the Soviet launch of Sputnik, the first artificial satellite to orbit the Earth, the United States went about winning the Space Race by investing in science and technology, leading not only to small steps on the moon but also to tremendous economic benefits here on Earth.

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