There have also been a number of cases of attempts to sell fake moon rocks.
还有一些试图卖假冒月球标本石的案件发生。
Moon rocks are considered national treasure in the United States and their sale is illegal.
月球标本在美国被认为是国家财产，出售标本是非法的。
They collected Moon rocks to take back to the Earth for further research.
他们采集了月球岩石带回地球作进一步研究。
They collected Moon rocks to take back to the Earth for further research.
他们采集了月球岩石带回地球作进一步研究。
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