以下为句子列表：
英文: By the multiple objective optimization, the diffusion angle of the ventilator volutes with high efficiency, low noise and high total pressure of the ventilators was calculated and selected according to the experimental data.
中文: 摘要根据实验数据，采用多目标最优化的方法，对效率高、噪声小、全压大等性能指标皆好的通风机蜗壳扩压角进行了理论计算选择。
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英文: Effects of blade negative bowing on secondary flow, total pressure loss and outlet flow angle were analyzed quantitatively, mechanism of the effects was discussed as well.
中文: 定量地分析了叶片反弯曲对叶栅出口二次流、总压损失和气流角的影响，并探讨了叶片反弯曲作用的机理。
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英文: Experimental results of the air pumping of a serpentine inlet under ground running show that the total pressure recovery at the exit is low and the distortion at the exit is large.
中文: 摘要对一种蛇形进气道开展了地面工作状态下的抽吸试验研究，结果表明，在该状态下进气道出口截面的总压恢复系数较低、流场畸变较大。
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英文: For a given media, and at a constant total pressure and temperature, the partial pressure of oxygen is proportional to oxygen mole fraction.
中文: 对一个给定的媒介，在恒定的总压和温度下，局部压力与氧的克分子数成比例。
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英文: The investigation shows that plenum chamber total pressure has multifarious effects on arcjet thruster operation, and both specific impulse and thrust efficiency can be improved by increasing it befittingly under steady arc.
中文: 研究表明，集气腔总压对推力器工作过程具有多方面的影响，在保证电弧稳定的情况下，适当提高集气腔总压可同时提高比冲和推进效率。
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