flap

The pigeon flapped its wings frantically to escape the hungry cat.

(Chinese) 鸽子拼命拍打翅膀以逃避饥饿的猫。

Large flags flapped loudly in the strong gusts of wind during the storm.

(Chinese) 暴风雨中，巨大的旗帜在强风中大声拍动。

The pilot extended the flaps to help slow the aircraft down for a safe landing.

(Chinese) 飞行员展开了襟翼，以帮助飞机减速以便安全降落。

The flaps on a plane's wing are adjusted depending on the altitude and speed.

(Chinese) 飞机机翼上的襟翼会根据高度和速度进行调整。