不知您坐飞机的时候注意过没有，如果飞机是在夜晚降落，在降落的时候，机舱的灯光都会调暗。这是基于什么原理呢？看了下面的解释您就会明白了。

When you fly, you may have noticed that every time the plane takes off or lands at night the cabin crew dim the lights. The reason is to acclimatize passenger's eyes to darker surroundings. This isn't purely for comfort but is a valuable part of aircraft safety. If the plane had to be evacuated in an emergency, passenger's eyes would be better acclimatized to the darkness outside.

acclimatize: 使适应新环境，使服水土