It's a history class.  And, actually, it's an elective!   If I'd known we'd have so much graded work, I might not have registered.  Still, I'm learning heaps, about an era that always puzzled me.

历史课。而且，实际上这还是一门选修课！如果我早知道有这么多计分作业，我可能就不会选它了。但是，我还是学到了很多，关于那个总是让我感到困惑的历史时期。