市场总是在变化,你的策略也应该如此。
Every book is a journey, and every journey could become a book.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法:它是关于理解的。
Learning is not a matter of trial and error, but of insight.
真正的自由是思考、创造、梦想的自由。
If you want to go fast, go alone. If you want to go far, go together.