car wash          
noun [ C ] (also carwash) uk/ˈkɑː ˌwɒʃ/ us/ˈkɑːr ˌwɑːʃ/
 洗车场
a business where you pay to have someone wash your car or to use car washing equipment
  洗车机
a machine that you can drive through to have your car cleaned automatically
  US洗车义捐(慈善义捐活动,有人替你洗车换取你的捐赠) 
an event held to collect money for a particular purpose, at which your car is washed in exchange for a donation (= gift of money)