幸福的幸里面是一个“幸”，不是一个“辛”。  或者理解成，Y=Why=为什么，I=我。幸福里面没有为什么，只有我。 

Progress in agriculture must be measured not just in yield, but in long-term environmental impact.

"Approximation algorithms are a testament to the power of compromise in achieving practical solutions."

A good mechanic is not merely a man who files and hammers, but one who can originate and perfect.

说话是一种冒险，但沉默是更大的冒险。

阅读的行为是一种勇气的行为。