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拓扑学是对图形在任何变形下保持不变的性质的研究。
The circular economy isn't just good for the planet - it's good business.
算法的发展既是一门艺术,也是一门科学。
Success is doing what you want to do, when you want, where you want, with whom you want, as much as you want.
The true cost of unsustainable fishing is far greater than what we see on the surface.
一个文明的真正衡量标准是它如何对待最弱的成员。