Gb	Eng
混凝土墙是用钢筋加固的。	The concrete walls are reinforced with steel rods.
机器安装在混凝土基座上.	The machine rests on a bed of concrete.
用混凝土砌砖.	The bricks are bedded in concrete.
在混凝土凝固以前, 一定要把柱子竖直了.	Make sure the post is true before the concrete sets.