The researchers found that the sand, glass, crystal, marble and Ruby minerals such signs exist.

研究人员发现了沙子、玻璃、水晶、大理石和红宝石之类的矿物存在的迹象。

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The researchers found that the sand, glass, crystal, marble and Ruby minerals such signs exist.

研究人员发现了沙子、玻璃、水晶、大理石和红宝石之类的矿物存在的迹象。

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