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The challenge for modern states is to maintain their legitimacy while also being effective in providing services and maintaining order.
It is in your self-interest to find a way to be very tender.
只管走过去,不必逗留着采了花朵来保存,因为一路上花朵自会继续开放的。
The beauty of mathematics lies in its simplicity and depth.
最好的实验往往源于简单的想法和细致的观察。