天文学家怀疑成对的行星也参与了这种弹弓活动，使它们处于不规则的椭圆轨道上。

Astronomers suspect that pairs of planets also engage in this slingshot activity, leaving them in disturbed, elliptical orbits.

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不可避免的火山活动和地球轨道变化会重创较为单一的生态系统，使其疲惫不堪，因此地球便开始有些乱了套。

As the thinner ecosystems were strained and overwhelmed by the inevitable perturbations of volcanic activity or changes in Earth's orbit, the planet went a bit haywire.

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尽管中国的探月工程成果辉煌(2011年中国将要发射第二个月球探测器)，但人们更感兴趣的是其低地球轨道与探测火星的活动。

Although much has been made of Chinese lunar ambitions (a second Chinese probe will be launched in 2011), it is its activities in low Earth orbit and around Mars that will be more interesting.

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