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	budgeting budgie Budweiser Buenos Aires buff Buffalo buffalo Buffalo Bill buffer buffet buffet car buffeting Buffett, Warren buffoon buffoonery Buffy the Vampire Slayer Bug bug bugaboo bugbear bugeyed bugger buggered buggery buggy

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