closing of barrier

例句：

1. 1.The closing of the barrier has made it difficult for people to cross.
   障碍的关闭使得人们难以穿越。
2. 2. The government is working on closing the gap between rich and poor.
   政府正在努力缩小富人和穷人之间的差距。
3. 3.The closing of the barrier will allow more people to access the park.
   障碍的关闭将允许更多人进入公园。