sedimentary bed造句

例句与造句

1. The colour of illite jade is of distinct gradation which is related to the content of hematite in different sedimentary bed
   该玉石的颜色层次结构清楚，分界明显，与不同沉积层中赤铁矿的质量分数有关。
2. It's difficult to find sedimentary bed in a sentence. 用sedimentary bed造句挺难的