theory classes的用法和樣例：
例句
- However, theory teaching is often overstressed, which severely affects the teaching efficiency.
目前高校公共理論課教學中存在重理論輕實踐的傾向，嚴重影響公共理論課的教學效果。 - The teachers' efforts are the vital part of improving the attraction and infectivity of college ideological and political theory courses.
摘要增強高校思想政治理論課的吸引力與感染力，關鍵在於教師的努力。
