什么是 coach?A motorbus.A railroad passenger car.A closed automobile, usually with two doors.A large, closed, four-wheeled carriage with an elevated exterior seat for the driver; a stagecoach.An economical class of passenger accommodations on a commercial airplane or a train.Sports A person who trains or directs athletes or athletic teams.A person who gives instruction, as in singing or acting.A private tutor employed to prepare a student for an examination.To train or tutor or to act as a trainer or tutor.To transport by or ride in a coach.