Every setback is a setup for a comeback.

"The beauty of computational complexity lies in its ability to classify problems based on their inherent difficulty."

解释：货卖完了才知道不足，是由于不懂得计量；事情结束了才知道有余，是由于不懂得调节。

There is a close connection between the human soul and the natural world; our emotions are intertwined with the external universe.

初恋只是一点愚蠢和大量的好奇心。