source- bed的用法和样例:
例句
- Source beds are turbidite of middle Triassic series.
矿源层为中三叠统浊积岩。
- The Jingshan and Jiaodong Groups metamorphic green formation is the source bed of the gold mineralization in this region.
区内荆山群和胶东群变质绿岩建造是金矿化的矿源层。
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