theoretical air quantity

例句：

1. 1. The theoreticalair volume of the aircraft is calculated basedon its size and weight.
   飞机的理论空气体积是根据其大小和重量计算得出的。
2. 2.The researcher believes that the theoretical airvolume can be used to predict the performanceof the engine.
   研究者认为，理论空气体积可以用来预测发动机的性能。
3. 3. The design of the cabinrequires consideration of the theoretical air volumeto ensure comfortable travel.
   舱室的设计需要考虑理论空气体积，以确保旅途舒适。