- 释义：
- v. （翅膀）拍打；摆动；挥动（手臂）
- 例句：
-
Although I moistened it, the flap doesn't stick to the envelope.
我把信封弄湿了, 可是信封口盖还是粘不上.
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-
The officer undid the flap of his holster and drew his gun.
军官打开枪套盖拔出了手枪.
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-
With a flap of its wings the sparrow flew off.
麻雀忒儿一声飞了.
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