复数： limestones
易混淆的单词： Limestone

The kitchen has white walls and limestone floors .

厨房有白色的墙壁和石灰岩地砖的地面。

Most caves are formed by limestone , a carbonate rock .

大多数洞穴是由石灰岩形成的，这是一种碳酸盐岩。

Calcium oxide is made by heating up limestone ( calcium carbonate ) .

因为二氧化钙是通过加热石灰岩（即碳酸钙）获得的。

They can be added to portland cement to replace some or all of the limestone .

这些物质可以添加到波特兰水泥中去，用来替代一些或者部分石灰岩。

Excavation was under way on a new trench , on the other side of a low limestone ridge .

在一条低矮的石灰岩脊体的另一侧，新的挖掘工作已经开始。