短語(yǔ)詞組短語(yǔ)ventilation windows opening model 開(kāi)窗模型natural ventilation opening area 自然通風(fēng)進(jìn)風(fēng)麪積main ventilation opening 主通風(fēng)口natural ventilation through large opening 大開(kāi)口自然通風(fēng)opening for ventilation 通風(fēng)口The opening lung ventilation 肺開(kāi)放通氣 返回 ventilation opening