Money is the motive.
故事可以帮助孩子们理解世界和他们自己。
The universe is not only stranger than we imagine, it is stranger than we can imagine.
唯一的限制是你为自己设定的限制。
我不再是个孩子了,我是个年轻人。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
时间是唯一没有野心的批评家。
You cannot teach a man anything, you can only help him to find it for himself.
生活其实很简单,但我们坚持把它复杂化。