ring·back 
(rĭngbăk′)
(rĭngbăk′)n.
The tone or audio recording that a caller hears when the telephone being called is ringing.
| 单词 | ringback |
| 释义 | ring·back (rĭngbăk′)n. The tone or audio recording that a caller hears when the telephone being called is ringing. |
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