backstroke造句
        ...the 100 metres 
backstroke.
100米仰泳比赛
Sometimes I use breaststroke, 
backstroke, and free style.
有时游蛙泳 、 仰泳和自由泳.
I get water in my ears when swimming the 
backstroke.
仰泳时,我耳朵总是进水.
Peter : Tedhere are freestyle, 
backstroke, butterfly frog stroke and etc.
有自由泳 、 仰泳 、 蝶泳、蛙泳等.