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我们不要害怕犯错,因为只有通过犯错我们才能学习和进步。
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.
The best time to plant a tree was 20 years ago. The second best time is now.
The companies that will thrive are those that see conservation as an investment, not a cost.