名词
中文翻译：内部齿轮
同义词：
['internal gear', 'internal mechanism']
例句：
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1.The car's engine is designed with inside gear to improve efficiency.
汽车的发动机设计有内部齿轮，以提高效率。
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2.The machine has a complicated inside gear system that controls the movement of parts.
这台机器有一个复杂的内部齿轮系统，控制部件的运动。
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3. The engineers worked on improving the inside gear design to make the machine more efficient.
工程师们致力于改进内部齿轮设计，使机器更加高效。