悔悟是去病之药，然以改之为贵。
解析：悔悟虽好，但改正更重要。
The concept of NP-completeness has provided a powerful tool for understanding the complexity of computational problems.
The boundaries which divide Life from Death are at best shadowy and vague. Who shall say where the one ends， and the other begins？
Transparency builds trust, and trust builds brands.