名词
中文翻译：四冲程发动机循环
同义词：
['four-stroke engine', 'four-stroke cycle']
例句：
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1.The new car has a four-stroke cycle that saves fuel and reduces emissions.
这款新车采用了四冲程循环，既节省燃料又减少排放。
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2. The four-stroke cycle is essential for maintaining the proper balance of the engine.
四冲程循环对于保持引擎平衡至关重要。
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3. In the four-stroke cycle, the piston moves up and down four times before returning to its starting position.
在四冲程循环中，活塞上下运动四次后返回起始位置。