1. The alular feathers on the bird's wing help with maneuverability in flight.
鸟翅膀上的小翼羽有助于在飞行中的灵活性。
2. The alular lobe of the insect's wing allows for precise control during hovering.
昆虫翅膀上的小叶片使得在盘旋时更加精确控制。