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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
- 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。
- The (flap of the) envelope was unstuck. 信封(的封口)没粘住。
- flapping coefficient 翼动系数
- Some doves were flapping their wings over the square. 有几只鸽子在广场上空振翅飞翔。
- 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
- Coloured flags were flapping in the wind. 彩旗在风中飘荡。
- Water has a variable coefficient of expansion. 水的膨胀系数是可变的。
- There's no use flapping about it now. 现在对于这件事讲空话是没有用的了。
- He doused the candle with a flap of his hand. 他用手煽熄烛火。
- Pascal published a treatus on binomial coefficient. 帕斯克发表了关于二项系数的论文。
- Cancel water vapour permeability coefficient. 取消了水蒸气渗透系数。
- Water is variable in coefficient of expansion. 水的膨胀系数是可变的。
- The bird was flapping its wings . 那只鸟拍动着翅膀。
- Functional coefficient of biological cycle: FCBC. 生物循环功能系数。
