The Breguet - Richet Quadrotor helicopter Gyroplane No.1 built in 1907 is reported to have lifted into flight.据报道,1907年,Breguet-Richet四旋翼直升机“旋翼机1号”已经飞了起来....

n.旋翼机...

gyroplane的音标：gyroplane的英式发音音标为：['dʒaɪərəpleɪn]gyroplane的美式发音音标为：['dʒaɪrəˌpleɪn]...