pentone

例句：

1. 1.The pentagon is a famous landmark in the city.
   五角大楼是这个城市的一个著名地标。
2. 2.The pentagon is used as a symbol of peace and stability.
   五角大楼作为和平与稳定的象征。
3. 3. The pentagon has been featured in many architectural designs.
   五角大楼在许多建筑设计中都有出现。