市场总是在变化，你的策略也应该如此。

Economic progress depends on both new ideas and better implementation.

The sun shone, having no alternative, on the nothing new.

你画的每一条线都有后果——空间的、结构的、社会的。

The concept of NP-completeness has provided a powerful tool for understanding the complexity of problems.

伟大的书籍是从不背弃我们的朋友。

最好的投资是教育。