What can go around the earth without rockets?

什么能不依靠火箭围绕着地球转？

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It wants to go around the Earth twice, but it hits the Earth.

它希望绕地球两次，但是撞上了地球。

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Over time the Moon rotation slowed until it equaled the time it took the Moon to go around the Earth.

月球自转一直变慢，直到相当于环绕地球一周所花费的时间。

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Now, there's nothing special about annual-- that's the time it take the Earth to go around the sun, but it doesn't have any relevance to finance-- but we are just accustomed to using that.

这里所谓的一年也没什么特别,就是地球绕太阳一圈的时间,和金融没什么关系,我们只是习惯这么用

耶鲁公开课 - 金融市场课程节选

It could mean they gain control of the spacecraft systems and can fire the engines, but after the orbit around Earth has dropped so low that there is not enough fuel to go to Phobos.

MSN: Salvaging Science from Stricken Mars Moon Probe: A Scientist's View - Technology & science - Space - Space.com | NBC News