I heard you are now practicing underwaterswimming, aren't you?
听说我在练习学潜泳，对吗？
2
In preparing for Short Course Nationals, keep in mind how crucial your starts, turns and underwaterswimming will be.
在准备短池比赛的时候，要记住你的出发，转身和水下泳姿将是多么重要。
3
The Olympic Games competitions prior to FINA had included a variety of unusual events such as underwaterswimming (1900), 200m obstacle swimming (1900) and plunge for distance (1904).
在国际泳联成立之前，奥运会游泳比赛曾包含一些非惯例项目， chaussure pas che，如1900年奥运会上的潜泳、200米阻碍泳和1904年奥运会上的水上跳近等。