美元金额数字怎么写答:20,30,40...90:twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety 百:hundred 千:thousand 百万:million 十亿:billion 比如美元7123458906,一般写作USD7,123,458,906 英文就是USD SEVEN BILLION ONE HUNDRED TWENTY THREE MILLION FOUR HUNDRED FIFTY EIGHT THOUSAND AND NINE HUNDRED SIX.42500...