fly frames

例句：

1. 1. Thepilot flew the plane with great skill.
   飞行员以高超的技巧驾驶飞机。
2. 2. The airplane's wings are made of lightweight materials.
   这架飞机的机翼由轻质材料制成。
3. 3. Thewings of the bird are designed to helpit fly.
   鸟的翅膀设计用来帮助它飞翔。