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习惯的强度与强化量成正比。
The strength of a habit is proportional to the amount of reinforcement.
最崇高的行为是将他人置于自己之前。
幸福的关键因素并非是物质的或审美的,而永远是心理上的。《旅行的艺术》
The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.