形容词
中文翻译：坚硬的
同义词：
['stiff', 'unyielding', 'inflexible']
例句：
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1.The material is very rigid and cannot bebent easily.
这种材料非常坚硬，不容易弯曲。
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2. The law is very rigid and mustbe strictly followed.
法律非常严格，必须严格遵守。
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3. The road was very rigid and madeit difficult to drive on.
这条路非常僵硬，使得驾驶变得困难。