例句：

　　1、He began studying politics and medieval history.

　　他開始學(xué)習(xí)政治學(xué)和中世紀史。

　　2、Politics has been reduced to class struggle.

　　政治變成了階級斗爭。

　　3、One can't separate politics from economics.

　　不能把政治與經(jīng)濟割裂開來。