flap
英 [flæp]美[flæp]
- n. 拍打,拍打声;神经紧张;[航] 副翼
- vi. 拍动;神经紧张;鼓翼而飞;(帽边等)垂下
- vt. 拍打;扔;拉下帽边;飘动
英英释意
- 1. any broad thin and limber covering attached at one edge; hangs loose or projects freely;
- "he wrote on the flap of the envelope"
- 2. an excited state of agitation;
- "he was in a dither"
- "there was a terrible flap about the theft"
- 3. the motion made by flapping up and down
- 4. a movable piece of tissue partly connected to the body
- 5. a movable airfoil that is part of an aircraft wing; used to increase lift or drag