bounded sequence

例句：

1. 1. The bounded area is fenced off from the outside world.
   这个有界区域被围栏与外界隔绝。
2. 2.The bounded space is only accessible through this narrow passageway.
   这个有限的空间只能通过这条狭窄的通道进入。
3. 3. The bounded resources are essential for the survival of the ecosystem.
   有限的资源对于生态系统的生存是必需的。