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人生最紧要系活得开心,其他都系次要。
The study of mathematics is like air or gravity—it is everywhere, and you can't see it, but you know it's there.
外表不端正的人,是因为德没有养成;内里不专—的人,是因为心没有治好。端正形貌,整饬内德,使万物都被掌握理解。