名词
中文翻译：Unknown
同义词：
['stiffness', 'muscle tone']
例句：
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1.The patient was diagnosed with stiffness inhis joints.
患者被诊断出关节僵硬。
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2.Muscle tone is important for maintaining goodposture and preventing injuries.
肌肉张力对于保持良好的姿势和预防受伤非常重要。
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3. During theexercise session, the instructordemonstrated how to use stathmokinesis to improve flexibility.
在练习期间，教练演示了如何使用肌肉张力来提高灵活性。