bounded operator

例句：

1. 1. The bounded area is fenced off from the rest of the park.
   这个有界区域被围栏与公园的其他部分隔离。
2. 2. The bounded space issmall but cozy.
   这个空间虽小但很温馨。
3. 3. The bounded field is opento the sky and has a beautiful view.
   这片有界田野面向天空，景色宜人。