calcined limestone

例句：

1. 1. The construction site was covered ina layer of calcined limestonedust.
   施工现场覆盖着一层煅烧石灰石粉尘。
2. 2. The engineer used calcinedlimestone to improve the strength of theconcrete.
   工程师使用煅烧石灰石来提高混凝土的强度。
3. 3. The calcinedlimestone was used as a building materialfor the new office building.
   煅烧石灰石被用作新办公楼的建筑材料。