名词
中文翻译：内部表面
同义词：
['inner surface', 'internal face', 'inner face']
例句：
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1.The car has an internal surface that is smooth and easy to clean.
这辆车有一个光滑且易于清洁的内部表面。
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2.The engineer studied the internal surface of the machine to understand its working principles.
工程师研究了机器的内部表面，以了解其工作原理。
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3.The new design features a sleek internal surface that enhances the overall aesthetics of the product.
新设计具有光滑的内部表面，增强了产品的美学效果。