limestone

详细解释:n. 石灰石
【化】 石灰石; 石灰岩
【医】 石灰石

英语解释：

名词 limestone:

a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals

例句：

First, ore is mixed with coke and limestone.先把铁矿石和焦碳、石灰石混合在一起。