Collect Rocks Every few hundred feet, scientists collect rock samples for study.
科学家按几百英尺的间隔收集岩石样本用于研究。
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 obtained rock samples from the moon.
他们从月球获得岩石的样品。
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.
他们收集许多岩石样本带回地球作进一步的研究。
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