precast concrete slab

例句：

1. 1. The construction crew was busy laying down the precast concrete slabs for the new road.
   施工队伍忙于铺设新道路的预制混凝土板。
2. 2.The engineer inspected the precast concrete slabs to ensure they met the required standards.
   工程师检查预制混凝土板以确保它们符合规定的标准。
3. 3. The precast concrete slabs were installed quickly and efficiently, saving us a lot of time.
   预制混凝土板安装得很快且效率高，节省了我们很多时间。