以下为句子列表：
英文: A constricted throat in the air passage of a carburetor, causing a reduction in pressure that results in fuel vapor being drawn out of the carburetor bowl.
中文: 文丘里管汽化器空气通道中的一段喉管，导致压力减小从而把燃料的蒸气抽出汽化器的碗状部分
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英文: Abstract: This paper deals briefly with the major events during the developmental process of mechanical ventilation and establishment of artificeal air passage, its main figures and historical contributions.
中文: 文摘:简述人工气道建立及机械通气技术发展过程中的主要事件、主要人物及历史贡献，阐明其重要意义。
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英文: I also placed her on an expectorant and arranged for a physical therapist to cup and clap her chest twice a week, hoping to help clear her air passages.
中文: 给她进行化痰治疗和一周2次的拍胸理疗，希望这样可以帮她清理气道。
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英文: I proceeded to take an X-ray, which showed that the air passages in the middle sections were thicker than normal.
中文: 我对她拍摄了胸部平片，发现肺中段的气道有点变厚。
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英文: It is a one-way flow control valve which can regulate the flow of compressed air in air passage.It will control forward flow,and not control reversed flow,so as to change the one-way movement speed of executive components such as air cylinder.
中文: 单向型流量控制阀，在气路中调节压缩空气的流量，气源正向流动时节流，反向流动时不发生节流，以改变气缸等执行元件的单向运动速度。
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