21的英文怎么寫21的英文是twenty-onetwenty-one2，21用英文怎么寫twentyone先說20再說1哦twenty-onetwentyone21的英文是twenty-one3，21的英文單詞twenty-one，如果是第21，那么是twenty-first，縮寫是21st。twenty-onetwenty-one您還，翻譯為twenty-one希望幫助你twenty-onetwenty-one...