fan; flap; float; wave

1. 羽毛會在空中四處飄動，尤其是在多風的天氣。如果遇上陣雨，就會因為淋上雨水變濕就沉，然后就會垂直落回到地上。
   A feather floats about on the air, especially on a windy day. If there is a shower of rain, the feather will get wet and heavy with water, and then it will sink straight to the ground.
2. 她的頭發(fā)隨風飄動。
   Her hair was flying about (in the wind).
3. 強風于旗子啪啪地飄動。
   The gale flapped the flags.

動的英語翻譯：