base rock

• 基岩

base rock的用法和样例：

例句

1. All that is needed on rock is a little concrete or mortar to make the surface level.
   在基岩上所需要做的全部工作是用少量混凝土或砂浆把表面找平。
2. The Maoping landslide is a large and old landslide of the bed rock in the Geheyan reservoir area of the Qingjiang River.
   茅坪滑坡是清江隔河岩库区一个大型的基岩古滑坡体。