on the ball片語KK [ɑn ðə bɔl] /ɑn ðə bɔl/發音片語1機警的、反應快的、精明能幹的口語The new receptionist is really on the ball with appointments.新來的接待員處理預約非常俐落。2消息靈通的、跟得上形勢的口語You have to stay on the ball to survive in this industry.在這個行業要生存,就得隨時掌握最新情況。