名词
中文翻译：主曲轴
同义词：
['main shaft', 'main shaft', "primary shaft例句：1. The car's main camshaft is responsible for controlling the engine's speed.（汽车的主曲轴负责控制发动机的速度。）"]
例句：
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1. The car's main camshaft is responsible for controlling the engine's speed.
汽车的主曲轴负责控制发动机的速度。
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2. Main camshafts are designed to be easily replaced.
主曲轴设计为易于更换。
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3.Main camshafts are crucial components of the engine.
主曲轴是发动机的关键部件。