历史学家必须怀有一种信念:人类不会也不能灭亡。
The historian must have a kind of faith that humanity will not and cannot perish.
历史不仅仅是事件的记录;它是一个民族的灵魂,是他们的梦想与奋斗。
The challenge with hepatitis C was not just to find the virus, but to understand how it evades the immune system.