"The moment you feel like giving up, think about why you held on for so long."
当你想要放弃的那一刻，想想你为什么坚持了这么久。
The security dilemma is a fundamental feature of international politics, as states' efforts to increase their own security often decrease the security of others.
"光线不在于你有多少光，而在于你如何使用它。"
The most important part of teaching is to teach what it is to know.