pilot ladder

例句：

1. 1.The pilot ladder is the first step for a pilot to take before they can fly.
   飞行员梯子是飞行员在能飞行之前必须经历的第一步。
2. 2. The ladder was made of wood and had a metal rung at the top.
   梯子由木头制成，顶部有一个金属横杆。
3. 3. He climbed up the ladder to reach the top of the tree.
   他爬上梯子爬到了树顶。