This paper presents the analogized methods and the active control experiments of the cabin noise for a propeller airplane.

本文介绍螺桨飞机舱内噪声的地面模拟方法和主动控制实验。

youdao

Drink extra fluids. Take some juice or a bottle of water with you. In an airplane, the cabin is very dry. Choose water instead of a soft drink.

多喝水。随身带一些果汁或一瓶水。在飞机上，机舱内很干燥。最好是择水而不是软饮料。

youdao

There have been tiny dents, oh, upping premium travel, up in the front of the airplane, in, you know, in the first class cabin.

NPR: Airlines Take Security Alert in Stride