VOA慢速英语:无动力飞机创下新飞行高度纪录

altitude - n. the height of something above the level of the sea​

cable - n. a thick, strong rope made of wires that are twisted together​

conform - v. to be similar to or the same as something ​

flutter - v. to move or flap the wings quickly without flying​

frostbite - n. a condition in which part of your body freezes or almost freezes​

turbulence - n. sudden, violent movements of air or water​