While other styles like the breaststroke, front crawl, or backstroke can be swum easily even by beginners, the butterfly is a more difficult stroke that requires good technique to be feasible.
初学者也许能很容易地掌握蛙泳、自由泳或仰泳，但蝶泳却难得多，对游泳者的技术要求很高。
Guide to front crawl for beginners - Learn a few techniques from our expert swimming teacher, to build up your confidence in the water and your knowledge of the front crawl swimming stroke itself.
新手入门级的自由泳指导-向专业的游泳教练学习一些技巧，一方面可以自立下水的自信心，另一方面也掌握一些关于自由泳的知识。
A Guide to front crawl for beginners - Learn a few techniques from our expert swimming teacher, to build up your confidence in the water and your knowledge of the front crawl swimming stroke itself.
新手入门级的自由泳指导-向专业的游泳教练学习一些技巧，一方面可以自立下水的自信心，另一方面也掌握一些关于自由泳的知识。
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