整数的单位有:hundred，thousand，ten thousand，one hundred thousand，million，ten million，a hundred million ，billion ，hundred thousand million billion等。
0 zero 1 one 2 two 3 three 4 four 5 five 6 six 7 seven 8 eight 9 nine 10 ten 11 eleven 12 twelve 13 thirteen 14 fourteen 15 fifteen 16 sixteen 17 seventeen 18 eighteen19 nineteen 20 twenty 21 twenty-one 22 twenty-two 23 twenty-three 30 thirty 32 thirty-two 40 forty 50 fifty 60 sixty 70 seventy 80 eighty 90 ninety 100 one hundred 101 one hundred and one156 one hundred and fifty-six192 one hundred and ninty-two200 two hundred300 three hundred400 four hundred 500 five hundred 1，000 one thousand 1，001 one thousand and one。
