健身英文短句答:lifeguard 救生员,breaststroke 蛙泳,crawl stroke 爬泳,back stroke 仰泳,side stroke 侧泳,butterfly stroke 蝶泳,surfing 冲浪,surfboard 冲浪板,water ski 滑水橇自行车:cyclist 骑自行车者,bicycle, cycle, bike 自行车,cycle track 自行车赛车道,cycling 自行车赛,to ride a bicycle 骑自行车,hand signals 手势, ...