one, two, three four, five, six, seven, eight,nine,ten, eleven,twelve, thirteen, fourteen,fifteen, sixteen, seventeen, eighteen,nineteen, twenty.这是1到20 20以后,就是twenty加上one依次到nine.twenty one... one, two, three four, five, six, seven, eight,nine,ten, eleven,twelve, thirteen, fourteen,fifteen, sixteen, seventeen, eighteen,nineteen, twenty.这是1到20 20以后,就是twenty加上one依次到nine.twenty one...