flap

noun

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

Synonym: ditherpotherfusstizzy

verb

1. pronounce with a flap, of alveolar sounds

2. make a fuss
be agitated

Synonym: ditherpother

3. move noisily

e.g. flags flapped in the strong wind

4. move in a wavy pattern or with a rising and falling motion

e.g. The curtains undulated
the waves rolled towards the beach

Synonym: rollundulatewave

5. move with a flapping motion

e.g. The bird's wings were flapping

Synonym: beat

6. move with a thrashing motion

e.g. The bird flapped its wings
The eagle beat its wings and soared high into the sky

Synonym: beat

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.

e.g. Grey sheets flapped on the clothes line...
灰色的床单在晾衣绳上飘来摆去的。
e.g. They would flap bath towels from their balconies as they chatted.
他们聊天时会在阳台上抖搂浴巾。

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.

e.g. The bird flapped its wings furiously...
鸟儿使劲地扑打着翅膀。
e.g. A pigeon emerges, wings flapping noisily, from the tower.
一只鸽子从塔里钻出来，扑扑地拍打着翅膀。

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.

e.g. ...a kid running and flapping her arms.
边跑边挥舞着手臂的小孩子

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.

e.g. He drew back the tent flap and strode out into the blizzard.
他拉开帐篷的门帘，大步走进暴风雪中。
e.g. ...a loose flap of skin.
耷拉着快要掉下的一块皮

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.

e.g. ...the sudden slowing as the flaps were lowered.
襟翼放下时的突然减速

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.

flap的翻译

e.g. Nothing to be heard but the soft flap of a silk banner.
万籁俱寂，只有一面绸制旗子轻轻飘动的响声。

7. 激动;焦虑;惊慌
Someone who is in a flap is in a state of great excitement, worry, or panic.

flap是什么意思

e.g. Why did people get in a flap over nuclear energy?...
为什么人们对核能惶恐不安呢？
e.g. Wherever he goes there's always a flap.
无论他到哪里，都会引起一阵骚动。

1.

1. 襟翼：具体作法是在主翼前缘设置补助翼(Slot)、可动补助翼(Slat)、襟翼(Flap)等,或是在后缘设置了前缘的襟翼,来进行境界层的控制. 因为设置子前缘的襟翼,或后缘的襟翼后,便能增加主翼的面积,在降落前,后缘的襟翼能改变主翼型的曲率,

2. 盖子：第一次听说的人,一般听到这里就开始害怕,手术时首先使用电动切割刀(Cutter)沿水平切割角膜,只留下一端不切割,然后以这一端为轴打开角膜,如同形成一个盖子(flap).

3. 摆动：而这些蛋白质与DNA结合. 为了确定BRCA1的作用,研究人员提取了这种 蛋白质的拷贝,使其在试管中与双链DNA结合. Gellert解释说,这些DNA带有模拟遗传学损伤的结 构,诸如Y-形分支或一个引致DNA长度自由摆动 (flap)的切口链.

4. flap：federacion latinoamericana de parasitologia; 拉丁美洲寄生虫学联合会