英语听力：自然百科 金星和水星旅行指南(21)（在线收听）

It's very interesting.

这很有趣。

Because we believe that the water in the earth,

因为我们相信,水在土壤中,

in its atmosphere,

在大气中，

in the ocean,

在海洋中，

and even below the surface,

甚至在地表以下，

probably came from the similiar source,

可能来自相同的来源,

and so part of the mystery of Mercury is trying to find out where the water came from,

水星部分的神秘就是试图找出水来,

and that might help us find out where the water earth came from.

这可能帮助我们发现水是从哪里来的。

It may never be possible to send a human to Mercury,

或许永远不可能把一个人送去水星,

but how about a robot?

但是一个机器人呢?

In 2011, when MESSENGER arrives in orbit,

在2011年,当信使号抵达轨道,

imagine this tough little spacecraft circling a lonely planet a very long way from home.

想象一下这个小宇宙飞行器在距离母星非常远的地方围绕着一颗寂寞星球的情境吧。