School children were warming up for a swimming lesson and I smiled as they exercised with their little faces all screwed up in concentration.
小学生们正在为游泳课做准备活动，看到他们的小脸上满是专注的表情时，我笑了。
Strangely enough, after that lesson my interest in swimming returned and now I swim four times a week.
奇怪的是，上完一堂课我反而更想游泳了。我现在是一个星期游四次。
Teach children to tread water with tips from a swimming instructor in this free video swim lesson. ( C! p.
教孩子们踩在这个自由视频从一个游泳教练技巧游泳课。
Teach children to tread water with tips from a swimming instructor in this free video swim lesson. ( C! p.
教孩子们踩在这个自由视频从一个游泳教练技巧游泳课。
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