名词
中文翻译：Unknown
同义词：
['inner frame', 'inner structure', 'inner framework system']
例句：
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1. The infraframe of the chair is made of wood.
椅子的内框架是用木头做的。
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2. The infraframe of the car is designed to be lightweight and strong.
汽车的内框架设计成轻便且坚固。
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3. The infraframe of the bridge is crucial for its stability.
桥梁的内框架对于其稳定性至关重要。