compacted sandstone造句

例句与造句

1. Biogas in commercial size existed in sedimentary basin which has high deposition velocity and low geothermal gradient and shale , coalbed or compacted sandstone in unconventional environments
   商业规模的生物气存在于具有高沉积速率、低地温梯度的沉积盆地中和非常规环境下形成的页岩、煤层或致密砂岩中。
2. It's difficult to find compacted sandstone in a sentence. 用compacted sandstone造句挺难的