The greatest theorems often start as simple conjectures, born out of intuition.
The true value of coal lies in how we extract and use it responsibly.
我坚信这个理论：你付出多少就会得到多少。
"History is not just what happened, but what people thought and felt about it."
我们成功的真正衡量标准是我们为后代留下了什么。