优质解答
20-29
twenty twenty-one twenty-two twenty-three twenty-four twenty-five twenty-six twenty-seven twenty-eight twenty-nine
30thirty
40forty
50fifty
后面和20的后面一样 -加个位数
20-29
twenty twenty-one twenty-two twenty-three twenty-four twenty-five twenty-six twenty-seven twenty-eight twenty-nine
30thirty
40forty
50fifty
后面和20的后面一样 -加个位数