So, what evidence of a liquid water environment did we find in rock samples taking from the oldest rocks on Earth?

那么，在从地球上最古老的岩石中提取的岩石样本中，我们发现了什么液态水环境的证据呢？

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If we had rock samples to study, we'd know whether these small craters were formed by impacts during the final stages of planetary formation, or if they resulted from later meteor showers.

如果我们有岩石样本用于研究，我们就能知道，这些小陨石坑是在行星形成的最后阶段被撞击形成的，还是后来的流星雨造成的。

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The astronauts obtained rock samples from the moon.

宇航员们从月球上获得岩石样品。

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The robot, which is analysing rock samples on the Red Planet, is now running from a back-up computer.

BBC: Mars rover

Once it has landed in Kazakhstan, the three rock samples will be recovered to see how they have fared.

ECONOMIST: Meteorites

The timing of the glitch would frustrate Nasa as Curiosity had just begun analysing rock samples, the BBC's science correspondent, Jonathan Amos, said.

BBC: Mars rover