"The bad guys keep coming." "And no matter whether the apprehension rates rise or fall, the numbers of criminal aliens rise.

VOA: standard.2010.04.21

So, the rise and fall of empires is obviously a theme of this course.

因此,帝国的兴衰,显然是这门课关注的主题之一

耶鲁公开课 - 欧洲文明课程节选