The quantitation and semi quantitation study of the material sources of Marine sediments is one of the important question for study in Marine sedimentology.
海洋沉积物的物质来源的定量、半定量研究，是海洋沉积学的重要课题之一，也是难题之一。
The quantitation and semi quantitation study of the material sources of Marine sediments is one of the important question for study in Marine sedimentology.
海洋沉积物的物质来源的定量、半定量研究，是海洋沉积学的重要课题之一，也是难题之一。
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