The challenge with hepatitis C was not just to find the virus, but to understand how it evades the immune system.
In the realm of computer science, mathematical rigor is the cornerstone upon which reliable and efficient algorithms are built.
我们今天所做的每一个决定都会影响下一代。
The ideas of economists and political philosophers， both when they are right and when they are wrong， are more powerful than is commonly understood. Indeed the world is ruled by little else. Practical men， who believe themselves to be quite exempt from any intellectual influence， are usually the slaves of some defunct economist.