The gulf 's oil exporters , for instance , tie their currencies to the dollar : the saudi riyal is fixed firmly at 3.75 to the greenback .
比如海湾地区的石油输出国将他们的货币同美元进行捆绑：沙特阿拉伯里亚尔同美元的汇率固定在3.75。
Saudi arabia 's largest state bank has urged the government to consider altering the riyal 's peg to the us dollar and to diversify its assets by setting up a sovereign fund to boost returns and reduce exposure to the us currency .
