| 释义 |
ring·backBrE /ˈrɪŋbæk/ NAmE /ˈrɪŋbæk/ (also Callback™ ) noun [U , C ]a telephone service that you can use if you call sb and their telephone is being used , so that your telephone will ring when the line is free ; a call made using this service 回铃声（电话服务）；有回铃音的电话 |