Downstairs, the builders have dug and concreted the foundations of a new supporting wall.楼下，建筑工人们已经挖开并用混凝土浇筑了一面新支承墙的地基。The ammunition is stored in concrete bunkers.弹药存放在混凝土浇筑的地堡中。The floors were made of concrete.这些地板是混凝土浇筑的。The concrete foundation has been poured.混凝土基座已经浇筑好了。