and it's all about the security situation in the world right now between states,

它是一门关于当下各国之间安全局势的课程。

想进布朗的话 - SpeakingMax英语口语达人

Can you give us a couple of examples what he'd do in a day or when a situation arises to safeguard the national security.

你可以举些例子,说说总统每天做什么,当情况发生时如何处理,来确保国家安全吗。

普林斯顿公开课 - 国际座谈会课程节选