按照您的需要任意混合搭配置换和引用。
Feel free to mix and match substitutions and references as needed to get the scenarios that you need.
分析了置换通风和混合通风的原理。
Analyses the principles of displacement ventilation and mixing ventilation.
讨论了通风有效性与空气分布特性的相关性，分析了混合通风（上送下回）通风效率低于置换通风效率的原因。
Discusses correlations between ventilation effectiveness and air distribution, analyses why the ventilation efficiency of mixing ventilation is lower than that of displacement ventilation.
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