十多年来行星科学家们已经发现了一些迹象，提示在那些太阳永远也照不到的寒冷月坑底部有结冰。而这些萦绕于心的种种迹象，让科学家们欲罢不能。

For more than a decade, planetary scientists have seen tantalizing hints of water ice at the bottom of these cold craters where the sun never shines.

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很多年过去了，书已经找不到了，甚至连书名也已记不清。 直到我去爱丁堡拜访亚历山大·考尔史密斯。

Long after losing track of the book and forgetting its title, I found myself in Edinburgh to interview Alexander McCall Smith.

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