你唯一的限制是你给自己设定的限制。
【释义】:早晨能发现昨夜的错误,今日能悔改昨日的过失。  
In business, as in life, relationships are the foundation of everything.
每一颗播下的种子都是对未来的承诺。
The concept of polynomial-time reduction is central to understanding the structure of NP-complete problems.