搜索结果: 1-1 共查到“国际动态 社会群众及分层问题研究”相关记录1条 . 查询时间(1.89 秒)
Smartphone tracking shows fear affects where youth spend time（图）
Smartphone fear affects youth spend time
2017/9/5
Youth spend less time in their neighborhoods if area residents have a high fear of crime, according to a new study that used smartphones to track kids’ whereabouts.Researchers found that adolescents a...