Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
可持续性不是一个部门,而是一个必须渗透到我们所创造的一切中的设计原则。
每个人都有自己内心的黑暗,是否表现出来取决于个人。
The structure of the international system, not the intentions of individual states, is the primary determinant of state behavior.
In the fields of observation chance favors only the prepared mind.
When you lend somthing pretend you are gifting. If it is returned, you'll be surprised and happy
When somebody hits you, hit back harder.