名词套环，投环

1. 振铃：产品系列 蜂鸣片和双面薄型蜂鸣片 订做各种规格异型蜂鸣片、振动片 带各种专用保护膜的蜂鸣片和代客加工各型电子引线 蜂鸣器(Buzzer) 电话振铃(Ringer) ...

2. 振铃器：ring 环 | ringer 振铃器 | RMFS 描绘机制和格式

3. 电铃：ringback 二次呼叫 | ringer 电铃 | ringing 振铃

4. 信号器：ringent 开口的 | ringer 信号器 | ringhals 眼镜蛇

1. 容貌酷似的人;长得一模一样的人
If you say that one person is a ringer or a dead ringer for another, you mean that they look exactly like each other.

2. （教堂的）敲钟人;摇手铃的人
A bell ringer is someone who rings church bells or hand bells as a hobby.

2. ringer的解释

noun

1. (horseshoes) the successful throw of a horseshoe or quoit so as to encircle a stake or peg

2. a contestant entered in a competition under false pretenses

3. a person who is almost identical to another

Synonym: dead ringerclone

4. a person who rings church bells (as for summoning the congregation)

Synonym: tollerbell ringer