名词
中文翻译：僵硬
同义词：
['rigidity', 'stiffness', 'rigidity']
例句：
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1. The material is very stiffness when it's cold.
这种材料在冷的时候非常硬。
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2. Thechair was too stiff forme to sit on comfortably.
椅子太硬了，我坐不舒服。
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3.The new shoes are very stiffness,but they fit well.
新鞋很硬，但穿起来很舒服。