[TOP]biplane bi·plane / ˈbaiplein / noun an early type of plane with ten sets of wings, six above the other (早期的)双翼飞机 ⇨ compare monoplane[TOP]biplane bi·plane / ˈbaɪˌplen ; ˈbaɪpleɪn / noun [C] 1. a type of aircraft with two sets of wings, especially one built in the early 20th century 双翼飞机〔尤指 20 世纪初期有两层机翼的飞机〕 [TOP]biplane['baɪ.pleɪn] noun countable » an old type of aircraft with two sets of wings, one above the other 双翼飞机 Compare monoplane [TOP]biplane
1.N-COUNT 可数名词 （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.