时差N小时 外星球上有生命吗?(上)（在线收听）

Well, we've all been hearing about ongoing Mars exploration, and how water probably used to be abundant there.

我们总会听闻一些火星探测以及火星曾含有大量水资源的报道。

And a water spewing volcano was recently discovered on a small moon orbiting Saturn.

最近，科学家在环绕土星转动的小卫星上发现了一座喷水火山。

Water is one sign that life may exist or have existed at some point.

水是生命可能存在或曾经存在过的迹象。

Astronomers have discovered sugar molecules floating in gas surrounding a young star about 400 million light years away.

天文学家发现，一颗约4亿光年外的恒星周围的气体中漂浮着糖分子。