When you are lost, you might turn to a map.

当你迷路时，不妨转向地图。

Is a device that indicates the direction when you are lost.

指南针是一种在迷路时可指示方向的器具。

When you are lost in an unknown place, you can ask the police for directions.

我有地址。我们可以在这里下车，然后再问路。