What we do today will determine the climate for centuries to come.
我最喜欢的生活中的事情不花钱。很明显,我们所有人最宝贵的资源是时间。
The most important thing in mathematics is to ask the right questions.
The greatest glory in living lies not in never falling, but in rising every time we fall.
写作的行为是一种自由的行为。