twenty-one?['twenti'w?n]：二十壹，表數字。
短語：
（1）twenty twenty-one thirty?十六
（2）fourteen fifteen twenty twenty-one thirty?三十
（3）Always twenty-one?永遠二十壹
（4）twenty-one bags?二十壹只書包
（5）Child Twenty-one?古典搖滾
擴展資料：
基數詞的用法
(1) 作定語。如：
There are only three boys in the class. 班上只有3名男生。
Ten people will come to the party. 十個人要來參加聚會。
(2) 作主語。如：
It is said that thirteen is an unlucky number. 據說13是個不吉利的數字。
Three of them will play football. 他們中有三人要去踢足球。
百度百科-基數詞