If we cannot improve subway ventilation effectively, the temperature in the subway will ascend to the degree that passengers are not able to tolerant.

• 由于地铁的快速发展，车次的增加和车速的提高，造成了地铁中热量的大幅增加，若不很好地解决地铁内通风，地铁内温度会上升到乘客无法忍受的程度。