In their quest to make cars safer, lighter and more fuel efficient, car makers are using more exotic materials in the bodies of vehicles, such as high-strength steels, aluminum, steel-plastic sandwiches.

• 为了让汽车更安全、更轻、更省油，汽车制造商在车身上使用各种新型材料，如高强度钢、铝、钢塑混合夹层等。