The two most important days in your life are the day you are born and the day you find out why.

The proof of a system's value is its existence.

地球并非刚体，其对力的响应必须被视为弹性体。

千丈长的大堤，会因为蝼蚁的小洞而溃决

The human mind is a machine for self-deception; we see what we want to see.

种一棵树最好的时间是20年前，第二好的时间就是现在。

繁荣的森林是成功的最终衡量标准。