体育学刊 关键词：优秀游泳运动员；年龄特征；最佳运动年龄 [gap=713]Key words: the top swimmers; age characteristic; the ages of the typical top
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如果是的话，为什么所有的优秀游泳运动员花时间在电路板上踢？
If that was the case, why do all elite swimmers spend time kicking on a board?
那很难说，因为优秀游泳运动员的脂肪与体重比例从6%到25%不等。
That's hard to say, since the percentage of fat in elite swimmers may vary from 6% to 25% of body weight.
据调查资料显示，当前国内外优秀游泳运动员中，“兼项”已成为普遍现象，且有继续增长的发展趋势。
The findings have indicated that at the present time "going in for several swimming events concurrently" has become a universal appearance among elite swimmers at home and abroad.
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