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Metro
01
地铁
an underground railway system designed for public transportation within a city
metro
n
例子
The metro was crowded during the morning rush hour.
The metro is an eco-friendly alternative to driving a car in the city.
He used an app to check the metro schedule.
Using the metro is often the fastest way to travel across large urban centers.
The city's transport system includes buses, trams, and a metro network.
