abutment of arch

例句：

1. 1.The abutment of the arch supports the weight of the building.
   拱顶支撑着建筑物的重量。
2. 2. The engineer designed the abutment to withstand the earthquake.
   工程师设计了拱顶以承受地震。
3. 3. The abutment is made of concrete and is visible from a distance.
   拱顶由混凝土制成，从远处就能看到。