20~40英语单词20-twenty 21-twenty-one22-twenty-two23-twenty-three24-twenty-four25-twenty- five26-twenty-six27-twenty-seven28-twenty-eight29-twenty-nine30-thirty 31-thirty-one32-thirty-two33-thirty-three34-thirty-four35-thirty-five36-thirty-six37-thirty-seven38-thirty-eight39-thirty-nine40-fourty
