twenty-firstˌtwenty-ˈfirst noun [countable usually singular] 
your twenty-first birthday or the celebration you have for it
your twenty-first birthday or the celebration you have for it
| 单词 | twenty-first |
| 释义 | twenty-firstˌtwenty-ˈfirst noun [countable usually singular] your twenty-first birthday or the celebration you have for it |
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