可持续性不再是选择，而是任何希望长期发展的企业的必需品。
"I'd never given much thought to how I would die, but dying in the place of someone I love seems like a good way to go."
I don't think that everyone should become a mathematician, but I do believe that many students don't give mathematics a real chance.
The greatest glory in living lies not in never falling, but in rising every time we fall.