汽车车架作为重型载重汽车的基体，支承着发动机、离合器、变速器、转向器、驾驶室、和货箱等所有簧上质量的有关机件。
As the matrix of heavy-duty truck, automobile frame is supporting all the relevant mechanics of sprung mass such as the engine, clutch, transmission, steering, driver's cab, and cargo box etc.
载重汽车在白天禁止通行。一到天黑，市郊高速公路上经常出现排成长队的18轮重型货车在等待进入市区。
The city also bans heavy trucks from entering the city during the day; after dark, the 18-wheelers can be seen lining up on suburban freeways, waiting for permission to enter.
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