osteon

例句：

1. 1.The ancient temple is supported by several osteons.
   这座古庙由几根柱子支撑。
2. 2.The tall building is built on a solid osteon.
   那座高楼建在一根坚固的柱子上。
3. 3. The osteon of the bridge is visible from the roadside.
   桥的柱子从路旁可见。