1.Such "sonic boom clouds" can occur when aircraft fly fast enough to cool the air around them, causing moisture in the air to condense.
类似这样的“音爆云”会在飞行器达到足以将周围空气冷却的速度时出现，空气中的湿气最终被液化。
2.the aircraft fly's exactly like a conventional fixed wing aircraft except the fact that she is SUPER STOL capable!
飞机飞行的完全一样，除了传统的事实，她是超短距起降固定翼飞机的能力！
3.In this picture taken circa 1935, military aircraft fly over the statue.
在这张摄于1935年的照片中，美国军用飞机从自由女神像头顶掠过。
4.When did the first aircraft fly?
第一架飞行器是什么时候起飞的？
5.The hardwire and their characters of the transport aircraft fly-by-light control system
运输机光传操纵系统的硬件及其特点