自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
V-ERG (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.
Grey sheets flapped on the clothes line...
They would flap bath towels from their balconies as they chatted.
V-ERG 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.
The bird flapped its wings furiously...
A pigeon emerges, wings flapping noisily, from the tower.
VERB 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.
...a kid running and flapping her arms.
N-COUNT (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.
He drew back the tent flap and strode out into the blizzard.
...a loose flap of skin.
N-COUNT (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.
...the sudden slowing as the flaps were lowered.
N-COUNT (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.
Nothing to be heard but the soft flap of a silk banner.
N-SING 激动;焦虑;惊慌 Someone who is in a flap is in a state of great excitement, worry, or panic.
Why did people get in a flap over nuclear energy?...
Wherever he goes there's always a flap.