biplanes

英 [ˈbaɪpleɪnz] 美 [ˈbaɪˌpleɪnz]

n.  (早期的)双翼飞机
biplane的复数



柯林斯词典

  1. (老式的)双翼飞机
    A biplane is an old-fashioned type of aeroplane with two pairs of wings, one above the other.