用bedrock surface造句子，“bedrock surface”造句

2、The reviviscence of accumulation landslide along bedrock surface is a common geological hazard.

1、abraded bedrock surface

3、Two special issues were studied on rockfill materials for the main dam, which was built on an inclined bedrock surface.

4、Analysis for the Spatial location of the bedrock surface and mechanical parameters on the deep anti-slide stability of gravity dams