“玄武岩”造句

玄武岩是最普通的火山岩.
Basalt is the commonest volcanic rock.

需要用玄武岩来铺设路面或修防洪堤.
Basalt is needed to surface a road or to build a break water.

所有的迹象只表明海洋地壳处都是玄武岩质的,组成也比较稳定.
All indications are that it is everywhere basaltic and relatively constant in composition.

• #玄武岩