这座桥是用钢筋混凝土建造的。

The bridge was built using reinforced ___concrete.

我们决定用混凝土露台替换木制平台。

We decided to replace the wooden deck with a ___concrete patio.

许多现代城市中心遍布着高耸的混凝土建筑。

Many modern city centres are full of towering ___concrete structures.