他在游泳方面很有经验 He was in swimming experience
他们在游泳 They are swimming
他在夏天游泳 He swim in summer
他们正在游泳池里游泳 They are swimming pool ; They are swim swimming pool
他在水池里游泳 He is sswimming at the pool
他肯定正在游泳 He Must Be Swimming
他在游泳
He is swimming.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他在游泳池旁的小更衣室里脱掉了衣服。
He got undressed in a small cubicle next to the pool.
《牛津词典》
也就是说，他在游泳、骑自行车、跑步的时候，不停地扔、接三个球。
That is to say, he kept on throwing and catching three balls while he was swimming, riding a bicycle and running.
youdao
他喜欢在河里游泳。
He likes swimming in the river.
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