original 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。 - The primary rocks were sparry oolitic limestone and micrite oolitic limestone, but dolomitization destroyed the original sedimentary textures.
原生岩石為亮晶鮞粒石灰岩和泥晶鮞粒石灰岩，白雲石化作用使其岩石結構大多遭受破壞。
