post tunnel portal

例句：

1. 1.The post tunnel portal is the first thing visitors see when they enter the museum.
   邮政隧道入口是游客进入博物馆时首先看到的东西。
2. 2.The post tunnel portal was designed to provide a seamless connection between different parts of the city.
   邮政隧道入口被设计成提供城市不同部分之间无缝连接。
3. 3. The post tunnel portal is often used as a meeting point for people who need to access the main entrance of the museum.
   邮政隧道入口经常被用作人们需要进入博物馆主入口的会议点。