beaver-tail beam

例句：

1. 1. The beaver-tail beam is a unique feature of this region's architecture.
   冰鱼梁是该地区建筑的独特特征。
2. 2. The beam was used to support the roof during construction.
   这个梁在建造时用来支撑屋顶。
3. 3. The beam has been preserved for centuries as a testament to the region's history.
   这个梁被保存了数百年，作为该地区历史的见证。