补充：12位读万亿,也作“兆”：trillion
第一个：606,608,616,618,666 six hundred and six trillion, six hundred and eight billion, six hundred and sixteen million, six hundred and eighteen thousand, six hundred and sixty-six.
(擦汗ing.)
第二个：808,808,818,888 eight hundred and eight billion, eight hundred and eight milliom, eight hundred and eighteen thousand, eight hundred and eighty-eight.
第三个：13,772,971,763 thirteen billion, seven hundred and seventy-two million, night hundred and seventy-one thousand, seven hundred and sixty-three.
规律就是：直接把逗号从右往左分别读作thousand, million, billion, trillion. 三位三位的数字就按百位数的读法就行了.话说人家外国人除非万不得已根本不这么费劲的读,遇到大数字,直接三位三位的读数,比如最后一个,他们会说one three, peroid, seven seven two, period, nine seven one, period, seven six three.
