1·A: ok, Mom. Can I swim now? I want to learn butterfly stroke.
好的,妈妈,我现在能游了吗?我想学蝶泳。
2·That's called a butterfly stroke. Can you swim, Ruth?
那叫蝶泳。露丝,你会游泳吗?。
3·Swimming is divided into breaststroke, freestyle, backstroke, and butterfly stroke.
游泳分为蛙泳,自由泳,仰泳,蝶泳。
4·I think butterfly stroke is the most difficult style to learn.
我想蝶泳是最难学的一种姿势吧。