cat20121028
把数组每隔三位分在一起，用逗号隔开，从右向左，第一个三位按hundred，第二个按thousand，第三个按million，递四个按billion读5,237,166,234 ，5对应billion，237对应million，166对应thousand，234对应hundred，所以读起来就是five billion two hundred and thirty-seven million one hundred and sixty-six thousand two hundred and thirty-four 16,250,064 sixteen million two hundred and fifty thousand and sixty-four
