The reason: it once had water.
原因就是:她曾经有水。
Wuxi is famous for its water but it once had trouble because of water.
无锡因水著名,也曾因水而困。
The planet is probably rocky, Fabrycky said, but any water or atmosphere it may once have had would have evaporated early in its lifetime.
法布瑞基说,行星很可能是由岩石组成的,如果它曾有过水或空气的话,也在早年就蒸发掉了。
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