limestone chips

例句：

1. 1. The construction crew was busy chipping away at the old building's foundation.
   建筑工人正忙着将旧建筑物的地基一块块地拆除。
2. 2.The engineer used limestone chips to reinforce the walls of the new office building.
   工程师使用石灰石碎片加固了新办公楼的墙壁。
3. 3. The builders were using limestone chips to level the ground before starting the demolition.
   建筑工人在使用石灰石碎片平整地面后开始进行拆除工作。