Think in terms of a subway map, but add in layers of data like water and sewer lines, power grids, and real time traffic information.

例如，在地铁地图上增加其他一些数据，如供水和排水管道、电网和实时交通信息等。

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I looked at the subway map on the wall and didn't know which line to take.

我看着墙上的地铁线地图，不知道该乘坐那条线路。

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I looked at the subway map on the wall and didn't know which line to take.

我看着墙上的地铁线地图，不知道该乘坐那条线路。

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