美国地铁的青年。

The youth of the American in subway.

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美国有不少城市有地铁，但是很多地方都没有。

Several cities in the U. S. have subway systems, but many do not.

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他老是乘地铁去上海， 后3句是美国粹生很少骑车去上学 …

He always take subway to Shanghai. He takes subway to Shanghai all the…

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他老是乘地铁去上海， 后3句是美国粹生很少骑车去上学 …

He always take subway to Shanghai. He takes subway to Shanghai all the…

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