dual elevator

例句：

1. 1. The new dual elevator has been installed in the lobby.
   新安装的双电梯已经安装在大厅了。
2. 2. The dual elevator is a convenient way to transport people between floors.
   双电梯是一种方便的在楼层间运送人员的方式。
3. 3. The dual elevator provides an efficient and safe way for guests to travel between floors.
   双电梯为客人提供了一种高效且安全的方式来楼层间旅行。