英语词汇RRB怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	RRB
释义	Definition of RRB in US English: RRB abbreviation Railroad Retirement Board. Definition of RRB in US English: RRB abbreviation Railroad Retirement Board.
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Definition of RRB in US English: