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That way your back muscles are prepared for the shock of the backward pull.
这样你的背部肌肉就为弓起身子做好了准备。
youdao
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Straighten left leg, then pull it backward from the hip.
打直左腿，用胯部将其向后拉。
youdao
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Straighten left leg, then pull it backward from the hip.
打直左腿，用胯部将其向后拉。
youdao