| 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 |