名詞 flapping:

1. the motion made by flapping up and down
   同義詞：flap, flutter, fluttering

動詞 flap:

1. move in a wavy pattern or with a rising and falling motion
   同義詞：roll, undulate, flap, wave
2. move noisily
   同義詞：flap
3. move with a thrashing motion
   同義詞：beat, flap
4. move with a flapping motion
   同義詞：beat, flap
5. make a fuss; be agitated
   同義詞：dither, flap, pother
6. pronounce with a flap, of alveolar sounds
   同義詞：flap

1. The movement or sound of repeated flapping.
   啪嗒啪嗒的動作，吧嗒吧嗒聲反復(fù)拍擊的動作或聲音
2. The sails were flapping gently in the wind.
   船帆隨風擺動。
3. The curtains were flapping at the open window.
   窗簾在敞開的窗戶前擺動。