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- I flap the flies away but soon they fly back. 我把苍蝇赶走，但一会儿又飞回来了。
- The curtains were flapping at the open window. 窗帘在敞开的窗户前摆动。
- The sails were flapping gently in the wind. 船帆随风摆动。
- What's the point of flapping about it now? 现在空谈这件事有什么用?
- The movement or sound of repeated flapping. 啪嗒啪嗒的动作，吧嗒吧嗒声反复拍击的动作或声音
- He varied the transmission frequency. 他变换了无线电传送的频率。
- A flap from the tail of the whale upset the boat. 鲸尾轻轻一拍便把小船打翻了。
- I got into a real flap when I lost my keys. 我丢了钥匙，心里发慌。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- The (flap of the) envelope was unstuck. 信封(的封口)没粘住。
- Fatal accidents have decreased in frequency over recent years. 近年来死亡事故发生的频率已经下降。
- Some doves were flapping their wings over the square. 有几只鸽子在广场上空振翅飞翔。
- We can often correlate age with frequency of illness. 年龄的大小往往与发病率有关。
- A decorative flap or loose fold on a garment or headdress. 垂饰外套或头巾上的装饰性的下垂物或松散的褶层
- Accidents on that highway are happening with increasing frequency. 那条高速公路上车祸发生得越来越频繁。
- Coloured flags were flapping in the wind. 彩旗在风中飘荡。
- There's no use flapping about it now. 现在对于这件事讲空话是没有用的了。
- flapping frequency 扑动频率
- He doused the candle with a flap of his hand. 他用手煽熄烛火。
- He tuned his radio to the police frequency. 他把无线电调到警方的频率。
