post setting

例句：

1. 1.The post office is located in the heart of the city.
   邮局位于市中心。
2. 2. The new postal system has made it easier for people to send and receive mail.
   新的邮政系统使得人们发送和接收邮件变得更加容易。
3. 3. The postal workers are responsible for sorting and delivering mail daily.
   邮政工人负责每天分拣和递送邮件。