有个小行星正处于可能与地球发生碰撞的航向上。

There is an asteroid on a collision course with the Earth.

《柯林斯英汉双解大词典》

有一天，一个外星飞碟来到了地球。

One day, a UFO come to the earth.

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有越来越多的证据表明，人类的存在使地球发生了巨大的变化，地质史上的一个新时代已经开始了——即人世时代，一个受人类影响的新时代。

There is growing evidence that the presence of humans has altered the Earth so much that a new Epoch of geologic history has begun—the Anthropocene Epoch, a new human-influenced Epoch.

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