ringer
noun [ C ] uk/ˈrɪŋ.ər/ us/ˈrɪŋ.ɚ/
(IN RACE)
冒名顶替参加竞赛的马（或人）
a horse or person that takes part in a race illegally under the name of another horse or person
See also: dead ringer
(VEHICLE)
装着假牌照的车辆
a vehicle that has been given a false registration number
(SOUND)
发出铃声的某物
a thing that makes a ringing sound
Turn off the phone's ringer by flipping the switch. 拨一下开关让电话铃声变静音。