To understand the universe, we must first understand ourselves.
It takes a strong man to save himself, and a great man to save another.
The charm of mystery novels lies not only in solving puzzles but also in the profound analysis of human nature.
就是说做不善的事情要受到惩罚，做善事会得到奖赏。
小说是一种以现实为食但将其变形的体裁。
系统辨识的挑战不仅在于拟合数据，还在于提取有意义且可推广的模型。
Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.