It was 4 a.m. when 16-year-old Yoo Chae-rin realized she had been on her phone for 13 hours. In less than three hours, she had to be up for school.
원문출처 : https://www.cnn.com/2019/10/20/asia/smartphone-addiction-camp-intl-hnk-scli/index.html
원문출처 : https://www.cnn.com/2019/10/20/asia/smartphone-addiction-camp-intl-hnk-scli/index.html