bill of exchange里的of作何解释?

bill of exchange里的of作何解释? Bill of exchange上的exchange for bill of exchange是什么意思 bill of exchange的填法 ‘Of ’在此处的用法作何解释? a level of analysis作何解释 in exchange of和in exchange for有何区别? bill of exchange和draft有什么区别 英语翻译bill of exchange:an accounditional order in writing addr 英语翻译AT SIGHT OF THIS FIRST BILL OF EXCHANGE(SECOND BEING UNP 译：our terms of payment are normally 30 days bill of exchange 英语翻译At ______ sight of this SECOND BILL of EXCHANGE ( first