1·He can swim breaststroke, backstroke and crawl.
他会游蛙泳、仰泳和自由泳。
2·The history of breaststroke dates back to the Stone Age.
蛙泳的历史追溯到石器时代。
3·The leg action of the breaststroke may have originated by imitating the swimming action of frogs.
蛙泳的腿部动作可能是模仿青蛙的游泳动作而来。
4·Without a coach and enough knowledge about how to take care of myself, I got injured and started to swim (breaststroke) to keep fit.
由于没有教练以及不甚了解如何照顾自己，我受伤了，开始游泳（蛙泳）来保持健康。
5·Last minute our diver was still swimming in the Pacific with flippers, and the next minute he was doing a breaststroke in a fire bucket 300 feet in the air.
前一分钟我们的潜水员还在太平洋里用脚蹼游水，下一分钟他就在300英尺高空的一个救火水桶里做蛙泳了。