Organisatiegraad en maatschappelijke betrokkenheid van jongeren 1990

Organizational level and social involvement of young people Interest in sports, practising sports, membership ( type of ) sports club / interest in nature and environmental...青少年的组织参与程度与社会参与状况 体育运动兴趣、体育锻炼参与情况、体育俱乐部会员身份（及会员类型）/自然与环境相关兴趣……