earth-rock placement

例句：

1. 1. The engineer made a careful placement of the pipes in the earth.
   工程师仔细地将管道放置在土里。
2. 2. The construction company had to make an earth-rock placement to support the building.
   建筑公司不得不进行地层放置以支撑建筑物。
3. 3.The geologist analyzed the earth-rock placement for clues about the formation of the land.
   地质学家分析了地层放置，以寻找土地形成的迹象。