The gill flaps opened like two gash wounds on the sides of its head as it thrashed helplessly in the gutter.

当它无助地在水沟里挣扎时，鳃瓣张开，犹如在它头部两侧切开了两道深深的伤口。

I zipped the tent flaps shut.

我拉上了帐篷门帘的拉链。

Uttering a cry, the sea gull flaps its wings.

海鸥拍打着翅膀，发出阵阵长啸。

Colugos glide between trees using their patagium, or flaps of skin between their front and hind legs and extending to the tail and the neck.

鼯猴利用它们的翼膜在树之间滑翔，该翼膜是它们前后肢之间的片状悬垂物，延伸到尾巴和脖子。

The cases were treated by the retroversal island flaps with the extensor indicis proprius tendon.

本组病例均采用固有伸肌岛状皮瓣加逆行岛状皮瓣修复。