eightieth 80th第
May eightieth五月第八十
eighty eightieth第八十
th eightieth第八十
the eightieth第八十
celebration of eightieth birthday八秩大寿
the eightieth anniversary八十周年纪念日
the eightieth Annountement国家知识产权局第80号公告
ORD（序数词） The eightieth item in a series is the one that you count as number eighty. 第80
Mr. Stevens recently celebrated his eightieth birthday.
最近史蒂文斯先生庆祝了他80大寿。