rock sill

例句：

1. 1. The engineer carefully measured the rock sill to ensure it was stable enough for construction.
   工程师仔细测量了岩石基座，以确保它足够稳定以供建设使用。
2. 2. The builders were working on the rock sill when a sudden gust of wind blew through the area.
   建筑工人在岩石基座上工作时，一阵突如其来的风突然吹过该地区。
3. 3. The rock sill is crucial for supporting the weight of the building and preventing it from collapsing.
   岩石基座对于支撑建筑物的重量以及防止其坍塌至关重要。