That's called a butterfly stroke. Can you swim, Ruth?
那叫蝶泳。露丝，你会游泳吗?。
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。
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。
The butterfly stroke had not accepted as a formal event until 1958.
蝶泳被列入正式比赛项目是在1958年。
I am very good at swimming, for I can do butterfly stroke and backstroke.
而且，我认为我游泳还是不错的。而且能有的很好。我会蝶泳，仰泳。
Find your rhythm, then add a butterfly stroke... without breaking your rhythm.
找到你的节奏，然后再加上一只蝴蝶姿势…不打破你的节奏。
A real important part of the butterfly stroke is the under water swimming, fly kick under water.
蝶泳非常重要的组成部分是水下部分，即水下蝶泳腿。
Butterfly is the only stroke I can't do.
只有蝶泳我不会。
Freestyle, butterfly, back stroke and breast stroke are four commonly seen strokes in swimming competition.
自由泳、蝶泳、仰泳和蛙泳是游泳比赛中常见的四种泳姿。
When I teach any stroke, in particularly butterfly, I use the part method.
我在传授任何泳姿时都会将身体分为各个部分来讲解，教蝶泳时更是这样。
Swim butterfly, focusing your attention on this connection on the front of the stroke.
游泳蝴蝶，集中精力在这个连接在前面的行程。
This is the feeling you're seeking on the initiation of each stroke of butterfly.
这是你正在寻找的感觉在每个冲程时的蝴蝶。
You need to use your back muscles to swim the butterfly-stroke.
你必须用你背部的肌肉来游蝶泳。
You need to use your back muscles to swim the butterfly-stroke.
你必须用你背部的肌肉来游蝶泳。
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