train destination indicator

例句：

1. 1. The train destination indicator is a crucial tool for locating trains.
   训练目标指示器是定位火车的关键工具。
2. 2.The train destination indicator helps to ensure that the train arrives at its destination on time.
   训练目标指示器有助于确保火车准时到达目的地。
3. 3. The train destination indicator can be used to track the progress of the train towards its destination.
   训练目标指示器可以用来追踪火车向其目的地的进展。