long range paging speaker

例句：

1. 1. The long-range paging speaker is used to alert people in remote areas of an emergency.
   长距离寻呼机扬声器用于在偏远地区紧急情况下提醒人们。
2. 2. The long-range paging speaker was a revolutionary technology that improved communication in the military.
   长距离寻呼机扬声器是一种革命性的技术，它提高了军事通信的效率。
3. 3. The long-range paging speaker system is still widely used today, despite advancements in other forms of communication.
   尽管其他形式的通信有了进步，但长距离寻呼机扬声器系统仍然被广泛使用。