preagonal

例句：

1. 1. The bridge has a preagonal design that enhances its stability.
   这座桥采用了预拱形设计，以增强其稳定性。
2. 2. The preagonal arches of the temple are intricately carved.
   寺庙的预拱形拱门雕刻得非常精细。
3. 3. The preagonal structure is designed to withstand heavy loads.
   这种预拱形结构被设计用来承受重载。