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生活是世界上最罕见的事情。大多数人只是存在,仅此而已。
The beauty of mathematics lies in its ability to simplify the complex.
A society grows great when old men plant trees whose shade they know they shall never sit in.
人生短暂如白马过隙,若不及时享受生活,年老时只能空自悲伤。