If you want to grow old as a pilot, you've got to know when to push it, and when to back off.

If you want to grow old as a pilot, you've got to know when to push it, and when to back off.

如果你想成为一名老飞行员，你必须知道什么时候该放手，什么时候该放弃。

-- Chuck Yeager 查克·叶格