The ratings downgrade of us sovereign debt has not erased the dollar 's special position as the numeraire of international transactions , the currency of choice for storing trade surpluses and the instinctive home for money in troubled times .

美国主权债务信用遭降级，并未扼杀美元的特殊地位作为国际交易的计价单位，作为储存贸易盈余的首选货币，作为局势艰难时本能的资金避风港。