1---12
13---19
20一90
百、千、百万、十亿
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→eighteen
19→nineteen
20→twenty
30→thirty
40→forty
50→fifty
60→sixty
70→seventy
80→eighty
90→ninety
100→ahundred
1,000→athousand
1,000,000→amillion
1,000,000,000→abillion(美)
athousandmillion(英)
1,000,000,000,000—
one(a)trillion(兆,万亿)