The great ideological battles between liberalism and communism, or between democracy and authoritarianism, have been replaced by a general consensus on the desirability of liberal democracy.
理解计算的极限需要深入研究支撑算法复杂性的数学基础。
爱情是唯一一种用自己铸造的货币来支付的情感。
The universe is not only stranger than we imagine, it is stranger than we can imagine.