He can swim breast stroke, backstroke and crawl.

他会游蛙泳、仰泳和自由泳。

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European children learn the breast stroke; they often don't know how to crawl.

欧洲小孩学习蛙泳；他们经常不知道怎样进行自由式游泳。

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European children learn the breast stroke; they often don't know how to crawl.

欧洲小孩学习蛙泳；他们经常不知道怎样进行自由式游泳。

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