"空余实践活动" 用英语可以说作 "extracurricular activities"。这个词来源于拉丁语，"extra" 意思是 "outside of"，"curriculum" 意思是 "the courses offered by a school"。因此，"extracurricular activities" 就是指学校课程之外的活动。
下面是一些例句：
My son is very busy with extracurricular activities after school. 我儿子放学后有很多空余实践活动要忙。
Participating in extracurricular activities can help students develop important skills and interests. 参加空余实践活动可以帮助学生培养重要的技能和兴趣。
Many colleges and universities look for apppcants who have a well-rounded background, including extracurricular activities. 许多大学和大学都希望申请人具有全面的背景，包括空余实践活动。