计算复杂性理论的发展向我们展示了并非所有问题都是平等的。
The pursuit of power is the primary goal of all great powers, and this pursuit often leads to conflict.
我不必那么害怕告别,因为告别不一定是永远的。
"The greatest happiness of life is the conviction that we are loved; loved for ourselves, or rather, loved in spite of ourselves."