Brokers shout and wave their hands.The system looks disorganized.But in fact it is part of an orderly market.Hand signals identify buyers and sellers and show how many contracts will be traded.是什么意思_Brokers shout and wave their hands.The system looks disorganized.But in fact it is part of an orderly market.Hand signals identify buyers and sellers and show how many contracts will be traded.在线翻译_英语_读音_用法_例句