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