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1·Grey sheets flapped on the clothes line.

灰色的床单在晾衣绳上飘动。《柯林斯英汉双解大词典》

2·The elephant flapped its ears.

大象拍打着双耳。《牛津词典》

3·The sails flapped in the breeze.

风帆在微风中摆动。《牛津词典》

4·A gust of wind flapped the tents.

一阵风吹动了帐篷。《牛津词典》

5·The swan flapped its wings noisily.

天鹅大声地拍打着翅膀。《牛津词典》

6·The bird flapped its wings furiously.

那只鸟使劲地拍打着翅膀。《柯林斯英汉双解大词典》

7·The bird flapped its wings and flew away.

鸟振翅飞去。《牛津词典》

8·Burke cast a cursory glance at the menu, then flapped it shut.

伯克粗略瞥了眼菜单，然后啪地合上了。《柯林斯英汉双解大词典》

9·Sometimes the rook flapped his black wings and soared away over the tree-tops in the park.

有时，乌鸦会拍打着黑色的翅膀，飞过公园的树梢。

10·They could not talk, the old sail flapped so furiously, even if the other noises would have allowed them.

他们说不出话来，因为那面旧帆篷响得太厉害了，噪音太大，没法交谈。

(1)skin flap皮瓣

(1)pocket flap袋盖

(1)valve flap阀瓣

(1)flap gate铰链式闸门；舌瓣闸门；翻转板

(1)flap valve瓣阀；片状阀

(1)flap wheel翼片砂轮