感谢 weandwe 提供的 Personal best: Improving your stroke techniques 链接，谢谢weandwe!
Personal best: Improving your stroke techniques展示了四个视频：
1.butterfly with Ian Crocker
2.backstroke with Michael Phelps and Ryan Lochte
3.freestyle with Michael Phelps and Katie Hoff
4.Butterfly with Michael Phelps
Butterfly with Ian Crocker 这个视频早在今年四月Одетта就提供过资源，经 glasgow 译成中文后，沙丘将文字胡乱安放了一个中文字幕版，也在悠网发过了。考虑到这四个算一个系列吧（再有蛙泳可就真正全了），且中文字幕应该比纯英文更容易接受些，因而本次就将中文字幕版与 Butterfly with Michael Phelps 一并发出啦（英文版的Butterfly with Ian Crocker就不发了）。
视频上传到纳米盘，有效期仅有七天。七天后若无人下载，上传文件便会被纳米系统自动删除。特此说明。
初次进入纳米盘可能会被要求下载安装一个“新版米人”，建议下载安装，否则无法正常下载本视频。
Butterfly with Ian Crocker
Join Ian Crocker and coach Eddie Reese as they provide strategies to improve your butterfly techniques. This portion of Personal Best will go over the proper stroke technique and race strategy, all of which will help you go faster in competition.
Butterfly with Michael Phelps
Join Michael Phelps and coach Bob Bowman as they provide strategies to improve your butterfly stroke techniques. Once acquiring the necessary skills at a slow speed you can gradually build them up to efficient technical skills to compete at a high level.
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