A metro is a rapid transit system that operates in city areas, typically consisting of trains that run on fixed tracks, often underground or elevated above ground. It is designed to provide fast and efficient transportation within a city or urban region. The metro system usually has multiple stops, making it easy for passengers to travel to different parts of the city. Metros are often used to avoid the traffic that can occur on the streets, offering a reliable and convenient way to get around.

What is a "metro"?

“metro”的英语定义和含义

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