及物动词
不及物动词
名词
1. (使)飘动;摆动;抖搂
If something such as a piece of cloth or paper flaps or if you flap it, it moves quickly up and down or from side to side.
2. 振(翅);挥(翅);(翅膀)拍打，抖动
If a bird or insect flaps its wings or if its wings flap, the wings move quickly up and down.
3. 挥动，舞动(手臂)
If you flap your arms, you move them quickly up and down as if they were the wings of a bird.
4. (布、皮等)扁平下垂物,垂下的部分
A flap of cloth or skin, for example, is a flat piece of it that can move freely up and down or from side to side because it is held or attached by only one edge.
5. (飞机的)襟翼，副翼，阻力板
A flap on the wing of an aircraft is an area along the edge of the wing that can be raised or lowered to control the movement of the aircraft.
6. (鸟翼、布条、纸片的)拍打声，拍动，拍打
A flap is a sudden noise or movement made by a bird's wing or by a piece of paper or cloth when it flaps.
7. 激动;焦虑;惊慌
Someone who is in a flap is in a state of great excitement, worry, or panic.
1. any broad thin and limber covering attached at one edge
hangs loose or projects freely
e.g. he wrote on the flap of the envelope
2. a movable airfoil that is part of an aircraft wing
used to increase lift or drag
Synonym: flaps
3. a movable piece of tissue partly connected to the body
4. the motion made by flapping up and down
Synonym: flappingflutterfluttering
5. an excited state of agitation
e.g. he was in a dither
there was a terrible flap about the theft