最强者也不能总是强大得足以永远作主人,除非他能把力量转化为权利和服从的义务。
Sustainability isn't a trend; it's a responsibility we owe to future generations.
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
每一天都是改变生活的新机会。
The only thing that separates us from the animals is our ability to accessorize.