Portland cement
/'pɔ:tlәnd/
📖 中文释义
- n. 波特兰水泥,普通水泥,硅酸盐水泥
📘 English Definition（英文释义）
- A cement having the color of the Portland stone of
- England, made by calcining an artificial mixture of carbonate of lime
- and clay, or sometimes certain natural limestones or chalky clays. It
- contains a large proportion of clay, and hardens under water.