单词详解
num.第二十一(The twenty-first item in a series is the one that you count as number twenty-one.)
She told me her birthday was the twenty-first of October.
她告诉我她的生日是在十月二十一日。
They are defining and confronting major underlying causes of ill-health in the twenty-first century.
他们确定并面对二十一世纪健康不良的主要根源。
It is as powerful an iconic image in the Twenty-First Century, as in the Twentieth.
在二十一世纪，它同样具有在二十世纪强有力的标志性意义。
相关单词
基数词：twenty-one
缩写词：21st
