名词
中文翻译：转速计
同义词：
['tachometer', 'transmission', 'regulator']
例句：
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1. The tachometer is used to measure the engine's speed.
转速计用于测量发动机的速度。
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2. The transmission is responsible for converting the engine's power to the wheels.
变速器负责将发动机的动力转换为车轮。
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3. The regulator controls the oil pressure in the engine.
调节器控制发动机中的油压。