在某些大城市比如上海、广州，很多人都知道车辆比自行车的速度要慢。
It is well known that in some major cities as Shanghai and Guangzhou the motor vehicles' speed is much slower than that of bicycle.
在某些大城市比如上海、广州，很多人都知道车辆比自行车的速度要慢。
It is well known that in some major cities as Shanghai and Guangzhou the motor vehicles' speed is much slower than that of bicycle.
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