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A mathematician's work is never done; there are always new questions to ask and new mysteries to solve.
The pleasure of not being young is that you can enjoy things without wanting to possess them.
问题不在于存在问题。问题在于期望并非如此,并认为存在问题本身就是问题。
最可持续的解决方案往往来自最简单的想法。
Trust is the most valuable resource in mining—harder to earn than any mineral.
森林的真正价值不仅在于木材产量,还在于生物多样性和生态系统健康。