Definition: a very hard building material made by mixing together cement, sand, small stones and water Level: B2
车库的地面是用混凝土铺成的。
The floor of the garage is made of ___concrete.
钢筋混凝土常用于桥梁建设。
Reinforced ___concrete is commonly used in bridge construction.
现代城市常以灰色混凝土建造的高楼为特色。
Modern cities often feature tall buildings built with gray ___concrete.
