ord.第八十
n.第八十，八十分之一
num.第八十；八十分之一的

原形：eightieth复数：eightieths

The eighty-first birthday of the queen was celebrated with great fanfare.
女王的八十岁生日庆典热闹非凡。
After eighty years, the old house finally needed some major renovations.
经过八十年，老房子终于需要大修了。
She has been teaching for eighty consecutive years, showing dedication to her profession.
她连续教书八十载，显示出对教育事业的献身精神。
They reached the summit after an exhausting eighty-mile hike.
在艰苦的八十英里徒步旅行后，他们登上了山顶。
The eighty-year-old couple still enjoyed dancing together at their weekly ballroom class.
这对80岁的老夫妇依然每周在舞厅课上共舞。
The eighty-page report detailed the findings of the research project.
这份长达八十页的报告详述了研究项目的发现。
He has completed eighty marathons in his lifetime, a remarkable achievement.
他一生中完成了八十次马拉松，真是了不起的成就。
The museum's collection spans over eighty centuries of art history.
博物馆的藏品跨越了八百年的艺术史。
It took them eighty attempts before they finally succeeded in launching the satellite.
经过八十次尝试，他们最终成功发射了卫星。
The eighty-year-old veteran shared his war stories with the younger generation.
这位80岁的老兵向年轻一代讲述了战争故事。