注意双肩放松，背部伸展。

Attention to your shoulders relaxed, back stretch.

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背部伸展针织品。

Back is stretch jersey fabric.

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伸展一下你的手臂，背部，腿和脖子。

Stretch your arms, back, legs, and neck.

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背靠背部和伸展你的腿。

Lean against the back and stretch your legs out.

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背靠背部和伸展你的腿。

Lean against the back and stretch your legs out.

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