You need to coordinate legs, arms, and breathing for the front crawl.

匍匐前进时，你要协调双腿、胳膊和呼吸。

《柯林斯英汉双解大词典》

As such the term freestyle is often used as a synonym for the front crawl.

因此人们常说的“自由泳”基本就成了“爬泳”的同义词。

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As such the term freestyle is often used as a synonym for the front crawl.

因此人们常说的“自由泳”基本就成了“爬泳”的同义词。

youdao