Other severe duty vehicles include light, medium and heavy-duty trucks, buses, heavy equipment, 4x4s, tow trucks, race cars, tractors, and motor homes.

其他严重的轻型车辆包括轻型，中型和重型卡车，客车，重型设备，辆四轮驱动汽车，拖车卡车，赛车，拖拉机和汽车家园。

youdao

There have been ideas about increasing energy-efficiency standards in buildings much as Carol has worked tirelessly to do with cars, light trucks and heavy duty trucks for the very first time.

WHITEHOUSE: Press Briefing on BP Oil Spill