theory classes的用法和样例：
例句
- However, theory teaching is often overstressed, which severely affects the teaching efficiency.
目前高校公共理论课教学中存在重理论轻实践的倾向，严重影响公共理论课的教学效果。 - The teachers' efforts are the vital part of improving the attraction and infectivity of college ideological and political theory courses.
摘要增强高校思想政治理论课的吸引力与感染力，关键在于教师的努力。
