ventilation perfusion ratio

例句：

1. 1. The hospital's ventilation perfusion ratio is crucial for patient recovery.
   医院的通风/换气比对病人的恢复至关重要。
2. 2. The doctor recommended a higher ventilation perfusion ratio to improve the patient's condition.
   医生建议提高通风/换气比以改善病人的状况。
3. 3. The new ventilation system has a higher perfusion ratio, which means it can provide more oxygen to the lungs.
   新的通风系统具有更高的换气比率，这意味着它可以为肺部提供更多的氧气。