采石场不仅仅是一个坑，它是我们留给后代的遗产。

Fear of imprisonment soul, hope you free.

In mathematics, as in life, the most elegant solutions often arise from a deep understanding of the problem.

"The stories we love best do more than entertain us; they shape who we are."

无人机的未来不是替代人，而是帮助人更好地完成工作。