iron man
noun
1- (especially in sporting contexts) an exceptionally strong or robust man（尤指体育运动中的）铁人, 非常强壮的人。
1.1
- often as modifier a multi-event sporting contest demanding stamina, in particular a consecutive triathlon of swimming, cycling, and running铁人三项赛（一种要求耐力的多赛项体育比赛, 尤指连续完成游泳、骑车、长跑的三项全能运动）。