青少年 - teenager, 方式 - way, method, 打工 - to work part-time, 社交 - interaction, social contact, 部分 - part, section, component, 屏幕 - screen, 上网 - to be on the internet, 视频 - video, 购物 - shopping, 阅读 - to read, reading, 或 - or, 而 - but, yet, 差异 - difference, 休闲 - leisure, 原因 - cause, reason, 家务 - housework, 外表 - appearance, 压力 - pressure, 必须 - must, 认为 - to believe, to think,

美国青少年的一天： 他们的时间都去哪儿了？

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