“flap”是拍打的意思。；当是及物动词的时候造句：；Some doves were flapping their wings over the square.；有几只鸽子在广场上空振翅飞翔。；I flapped the flies away but soon they flew back.；我把苍蝇赶走，但一会儿又飞回来了。；当是不及物动词的时候造句：；The flag flaps in the wind.旗在风中飘动。；What's the point of flapping about it now?；现在空谈这件事有什么用