basement rock的用法和樣例：
例句
- 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漿把表面找平。 - 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庫區一個大型的基岩古滑坡體。
