英文中是每三位逗号隔开为一个单位,所以这个数字我们可以写成123,456,789,678。
英文中数字单位为百hundred,千thousand,百万million,十亿billion
可以分解念为123billion+456million+789thousand+678
即 one hundred and twenty-three billion four hundred and fifty-six million seven hundred and eighty-nine thousand six hundred and seventy-eight