Marine protected areas are like savings accounts for fish populations.
Success in business requires training and discipline and hard work. But if you're not frightened by these things, the opportunities are just as great today as they ever were.
NP完全性的概念为理解计算问题的复杂性提供了一个强大的工具。
The biggest risk is not taking any risk. In a world that is changing quickly, the only strategy that is guaranteed to fail is not taking risks.