形容词
中文翻译：坚硬的
同义词：
['stiff', 'unyielding', 'inflexible']
例句：
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1. The rope is too rigid to be stretched easily.
这根绳子太硬了，不容易拉长。
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2. The weather has become very rigid lately.
最近天气变得非常寒冷。
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3. He is a rigid person who does not like to change his mind.
他是一个固执的人，不喜欢改变主意。