autocross

n [U] sport of motor-racing across country 汽车越野比赛.

authoritatively, authorities, authority, authorization, authorization, -isation, authorize, authorize, authorise, authorized, authorship, autism, autistic, auto, auto-suggestion, autobahn, autobiographic, autobiography, autocracy, autocrat, autocratic, autocratically, Autocue, autograph, automat, automate, automatic, automatic pilot, automatic transmission, automatically, automation, automaton, automobile, automotive, autonomous, autonomously, autonomy, autopsy, autostrada, autumn, autumnal, auxiliary,