国家本质上是具有侵略性和扩张性的。

我努力改了四十年，现在才刚刚控制住。我过去几乎每天都生气，乔，但我学会了不把它表露出来；我还希望学会不把它感觉出来，虽然可能有的花上四十年的功夫。

"To understand the present, we must listen to the voices of the past."

The discovery of topological insulators has opened up a new frontier in condensed matter physics, where the interplay between topology and symmetry leads to novel quantum states of matter.

在国际仲裁中，信誉建立在专业和诚信之上。