汽车 工程专业 英语 李俊玲 罗 永革版（原文与翻译 ） todays average car contains more than 15000 separate,individual parts that must work together.these parts can be grouped into four major categories:body,engine,chassis and electrical system. 现 在的汽车 一般都由 15000 多个分散、独立且相互配合的零部件组 成。这 些零部件只要分为 四类 ：车 身、发动 机、底盘 和电 气设备 。 an automobile body is a sheet metal shell with windows,a hood and a trunk deck built into it.it provides a protective covering for the engine,passengers and cargo.the body is designed to keep passengers saf
