dunite

n.[地]纯橄榄岩

二氧化硅铝岩、二苏石、白云岩、钙。一种铝镁硅酸盐岩，可产铸造砂、建筑材料等。

名词

1. This region is known for its abundant deposits of dunite.
这个地区以其丰富的二氧化硅铝岩矿床而闻名。
2. Dunite is often used as a refractory material due to its high melting point.
由于其高熔点，二氧化硅铝岩常被用作耐火材料。