单词	ringback
释义	ringbackring‧back /ˈrɪŋbæk/ noun [uncountable] a telephone service that you can use when you call someone who is already using their telephone. The service arranges for their telephone to ring yours as soon as their line is free.
随便看	undercarriage undercharge underclass underclassman underclothes undercoat undercover undercurrent undercut underdeveloped underdevelopment underdog underdone underdressed underemployed underestimate underexpose underexposed underfed underfelt underfloor heating underfoot underfunded underfunding undergarment

英语词典包含52748条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。