Want thin leg, he must first dozen loose their legs, or muscle stiff, thin leg and how to succeed?
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or muscle stiff
或者肌肉僵硬
以上为机器翻译结果，长、整句建议使用 人工翻译 。
To check this, your muscles have sensory receptors inside the muscle tissue itself which tell your nervous system just how stiff or relaxed these muscles are.
由此，肌肉组织内部有感觉感受器，通过这些感受器向神经系统传达肌肉的僵硬度或者是松弛度。
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