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For backstroke, holding the arm out front doesn't really work.
对于仰泳，将手放前面并没有效果。
youdao
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Backstroke Spin drill is an intense, fun drill for swimmers of all ages.
仰泳的转臂训练是一项强烈并有趣的训练，适合所有年龄的游泳者。
youdao
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Backstroke Spin drill is an intense, fun drill for swimmers of all ages.
仰泳的转臂训练是一项强烈并有趣的训练，适合所有年龄的游泳者。
youdao