Sunlight that bounced back from the Moon carried a fingerprint of the Earth's atmosphere that could help astronomers determine if the extrasolar planets they're finding harbour life.
从月亮反射的太阳光形成一个地球大气层的“指纹”，可以帮助天文学家断定他们发现的那些太阳系之外的行星上是否孕育着生命。
It is quite possible that, within our lifetimes, atmospheric studies of these extrasolar planets will provide the first evidence of biological life beyond Earth.
在我们的有生之年，对于这些外太阳系行星大气层的研究，很有可能提供地球外存在生命的首个证据。
The study may help astronomers build telescopes to pick out life-friendly extrasolar planets in the future.
这项研究将来也许可以为天文学家搭建用以选择太阳系外适合生存的行星的望远镜提供帮助。
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