3. However, respondents also noted that social media has caused them to read fewer books, suffer from worse eyesight, sleep less and maintain less privacy, among other concerns.
4. 单词coach 联想记忆：
5. Rounding out our top five is Sandra Bullock, one of only two women on our list (the other is Jennifer Lawrence in 10th place). Bullock had two big hits this year in two very different genres: Gravity was a tense thriller that will likely earn her another Oscar nomination, while The Heat was a cop comedy that kicked butt at the box office, bringing in $230 million globally.
6. We will ensure workplace safety and people's lives.