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1.The auxiliary valve is responsible for controlling the flow of oil in the engine.
辅助阀门负责控制发动机中油的流动。
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2.The auxiliary valve was designed to improve the efficiency of the engine.
辅助阀门被设计用来提高发动机的效率。
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3.The auxiliary valve was replaced after a few months of use, as it had become clogged.
辅助阀门在使用几个月后被更换，因为它已经堵塞了。