最后但并非最不重要的是，过度使用手机意味着与生活在现实生活中的人们面对面交流的机会大大减少。

Last but not least, excessive use of mobile phones means much less chance of face-to-face interactions with the people who populate their real lives.

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到了20世纪50年代和60年代，人们的睡眠时间大大减少。

By the 1950s and 1960s, that sleep schedule had been reduced dramatically.

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这就大大减少了人们的工作量。

This greatly reduced people's work load.

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