1. If you want my opinion, extracurricular activities are very useful. 如果你想听我的看法：课外活动是很有用的。
2. Throughout the program, students develop a sense of family through course work, team projects and extracurricular activities. 在整个课程中，学生通过课程开发工作，团队项目和课外活动的家庭感。
3. No matter what the extracurricular books the college students like to read or dislike to read, they are of highly-diversification. 无论大学生喜欢阅读的课外书还是大学生不喜欢阅读的课外书，均呈现出高度多样化的状态。
英英解释
adj.
1. outside the regular academic curriculum
2. outside the regular duties of your job or profession
3. characterized by adultery
