The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
决策分析是根据价值和不确定性评估复杂选择的学科。
我从不担心行动。而只担心没有任何行动。
The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'
无产阶级平等要求的实际内容都是消灭阶级的要求。