ring sb back给某人回电话;送回某人
ring g back回电话
Ring-back signal回铃信号
ring-back回叫
ring-back key回铃电键
ring-back tone电话回铃音业务
ring-back apparatus振铃装置
ring-back condenser回铃音电容器
ring-back tone service回铃业务
PHRASAL VERB(动词词组) If you ring someone back, you phone them either because they phoned you earlier and you were not there or because you did not finish an earlier telephone conversation. 回电话 [英国英语][no passive]