port activity problem

例句：

1. 1. The port is the main entrance to the city.
   港口是城市的主要入口。
2. 2. The ship docked at the port.
   船停靠在港口。
3. 3. The port is a busy area with many shops and restaurants.
   港口是一个繁忙的区域，有许多商店和餐馆。