常见例句双语例句There are rich bivalve and brachiopodous fossils within the bioclastic limestone and calcareous mudstone in the Buqu Formation in age from Bathonian.布曲组中的生物碎屑灰岩和钙质泥岩层中产大量的双壳类和腕足类化石，时代为中侏罗世巴通期。 返回 bathonian age