At a cruising altitude of 30,000 feet, pressure outside of the plane is about two and a half times lower than what passengers experience on the inside.
在三万英尺的巡航高度，飞机外部的气压大约比乘客感受的内部气压低2.5倍。
2
At a cruising altitude of 30, 000 feet, pressure outside of the plane is about two and a half times lower than what passengers experience on the inside.