作为城市交通工具来说，选择公共汽车比选择地铁更方便因为公共汽车不需要特殊的路线。
It is easier to take buses as means of city traffic than the subway trains because buses don't need special roads.
作为城市交通工具来说，选择公共汽车比选择地铁更方便因为公共汽车不需要特殊的路线。
It is easier to take buses as means of city traffic than the subway trains because buses don't need special roads.
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