(noun.) any broad thin and limber covering attached at one edge; hangs loose or projects freely; 'he wrote on the flap of the envelope'.
(noun.) a movable airfoil that is part of an aircraft wing; used to increase lift or drag.
(noun.) a movable piece of tissue partly connected to the body.
(noun.) the motion made by flapping up and down.
(verb.) pronounce with a flap, of alveolar sounds.
(verb.) move noisily; 'flags flapped in the strong wind'.
赛勒斯录入
安格斯校对