过去从未消逝，它甚至还未过去。
我花得最好的一分钟是投资在人们身上的那一分钟。
The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.
科学的挑战不仅在于找到答案，还要理解其更深层次的含义。
最危险的事情是在情况不妙时装作一切正常。