理解基础是掌握任何复杂系统的关键。
Understanding the fundamentals is key to mastering any complex system.
写作就是呼吸,就是生活,就是存在。
Algebraic geometry is the study of zeros of polynomials.
能源危机是一个可以解决的问题——如果我们现在行动的话。
The value of an economic model lies in its ability to explain and predict.