We use one map if we are driving from home to work, another one if we are traveling to another city. Yet other kinds of maps are needed if we are on a bike, on foot, or planning to take public transport.
我们在上下班路上使用某张地图，在去另一个城市旅行时使用另一张地图。但如果我们是骑车、步行或计划乘坐公共交通工具出行，那么还需要其他类型的地图。