Jake is a commissioner of Motor Vehicles.
杰克是机动车专员。
commissioner: /kəˈmiSH(ə)nər/ 专员: a person appointed to a role on or by a commission(委员会).
motor: /ˈmōdər/ [Noun] 马达；发动机 [Verb] 汽车的
vehicle: /ˈvēək(ə)l/ 车辆
Motor Vehicles: 机动车:
a road vehicle powered by an internal combustion engine (内燃机); an automobile (汽车).