They collected some rock samples to take back to Earth for further research.
他们搜集了所有的岩石样本，带回地球作进一步的研究。
They collected many rock samples to take back to Earth for further research.
他们收集许多岩石样本带回地球作进一步的研究。
They collected many rock samples to take back to Earth for further research.
他们采集了许多岩石标本，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。
They collected more than thirty kilograms of rock and soil to take back to Earth.
他们收集了超过30公斤的岩石和土壤带回地球。
They collected more than thirty kilograms of rock and soil to take back to Earth.
他们收集了超过30公斤的岩石和土壤带回地球。
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