The classic sweptback shape enables jets to fly up to a speed of MACH 0.8(about 550 mph) and to slow down, using complex flaps and slats, to speeds safe for takeoff and landing.

• 经典的后掠翼形状的设计使飞机可以以马赫数0.；8（大约550海里/小时）的速度飞行，并且使用复杂的襟翼和缝翼可以减速到安全起飞和着陆的速度。