Firstly, the number of vehicles is increasing so fast that roads are becoming more and more crowded.

首先，交通工具的数量增长过快，因此道路变得日益拥挤。

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With the number of cars continuing to rise, the roads in cities are getting more and more crowded.

随着车辆不断的增加，城市道路正变得越来越拥挤。

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With the number of cars continuing to rise, the roads in cities are getting more and more crowded.

随着车辆不断的增加，城市道路正变得越来越拥挤。

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