可持续性不是一种风格，而是一种责任。
Sustainability is not a style, it's a responsibility.
The pursuit of mathematical truth is a deeply personal and profoundly universal endeavor.
Writing is a way of speaking without being interrupted.
无论多么困难，我都不会放弃我的梦想。
The propensity to truck， barter， and exchange one thing for another is common to all men， and to be found in no other race of animals.