名词
中文翻译：倒退的弹簧
同义词：
['retrograde spring', 'anti-clockwise spring']
例句：
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1. The car's engine is designed to have a backward spring for smooth operation.
汽车发动机设计有反向弹簧，以实现顺畅运行。
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2.The old clock had a back-spring that would not reset until it was manually wound.
旧式钟表有一个反向弹簧，需要手动上弦才能重置。
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3.In the game, players need to use their back-spring to overcome obstacles and reach the finish line.
游戏中，玩家需要利用他们的反向弹簧来克服障碍并到达终点线。