余活，读音为yú huó，汉语词语，意思为馀生。
业余活动 Leisure-time activities ; Leisure activities ; Free Time Activities ; Spare Time Activities
课余活动 Extracurricular Activities ; after-school activity ; after-school activities
我的课余活动 My Out-of-class Activities
学校课余活动 School Activities
在学校课余活动 In extra-curricular activities in schools
残余活度 residual activity
残余活性物质 residual active mass
几乎没什么业余活动 Few leisure activities ; Almost no leisure-time activities
斜塔课余活动的形式 Leaning form After-school Activity
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