undersquare

例句：

1. 1. The architect designed a beautiful undersquare for the new building.
   建筑师为新建筑设计了一个美丽的正方形。
2. 2.The square is surrounded by trees and flowers, making it a popular spot for people to relax.
   这个广场被树木和花朵环绕，是人们放松的好地方。
3. 3. The square was crowded with people, some holding signs and others chanting slogans.
   广场上人山人海，一些人举着标语牌，一些人高喊口号。