barrier flat

例句：

1. 1. The construction of the barrier has been completed.
   隔离区的建设已经完成。
2. 2.The barrier is designed to prevent people from entering the restricted area.
   隔离区的设计是为了阻止人们进入受限制的区域。
3. 3. The barrier was built to separate the two sides of the road.
   隔离区被建造来分隔道路的两边。