The challenge with hepatitis C was not just to find the virus, but to understand how it evades the immune system.
丙型肝炎的挑战不仅在于找到病毒，还在于理解它是如何逃避免疫系统的。
Mental life is a continuous adjustment to internal and external demands.
每个程序都有（至少）两个目的：一个目的是为它编写的，另一个不是目的。