...a lavish party to celebrate Bryan's fiftieth birthday...庆祝布赖恩50寿辰的盛大宴会He retired in 1970, on his fiftieth birthday.他在 1970 年自己 50 岁生日时退了休。...a lavish party to celebrate Bryan's fiftieth birthday...庆祝布赖恩50寿辰...
He retired in 1970, on his fiftieth birthday.他在1970年自己50岁生日时退了休。A golden wedding is the fiftieth anniversary of a marriage.金婚是结婚五十周年纪念日.Dartmouth College just marked the fiftieth anniversary of that summer study.在那个夏季研究上...