From Wikipedia "Developement mule":A development mule or a test mule in the automotive industry is a vehicle equipped with experimental or prototype components for testing. Automakers evaluate aspects of vehicles before a full pre-production car is built to find problems. Mule cars are drivable, often years ahead of actual production.[1] They may come after concept cars that sometimes lack critical mechanical components. They may also have advanced chassis and powertrain designs from a future vehicle that need to be tested, but "clothed with the body and interior of some other car about the same size.[2]Mules are often heavily altered and the exteriors may be disguised as current production vehicles or as completely different models.[3] Some noticeable alterations include simple cylindric shapes for the lamps in the taillights, different rims on the front and back without centrecaps, and a severe amount of added plastic and tape to hide the actual shape and design of the vehicle.[4]Development mules are most often used very heavily during testing[5] and are scrapped. In unusual cases, test mules were acquired by members of the automaker's engineering team.请自己翻译一下吧。
晓布丁2011
