汽车英语中的：body-over-frame construction是什么意思

Body-over-Frame Construction
An automotive body type in which the frame consists of thick steel girders,and the chassis and body parts are bolted to the frame.Body-over-frame construction is common in trucks and sport utility vehicles (SUVs).Body-over-frame vehicles are sturdy,but are also heavy and typically have poor fuel economy.
一种车体结构,由厚钢板组成的钢网架,底盘和车体部件铆接到框架上.通常用在卡车和suv上,强度很高,只是费油!