因为可能会鼓励青少年尝试吸烟，新浪微博撤下了“吸烟”的表情。

Because it might encourage teenagers to try smoking, Sina Weibo took down the "smoking" emoji.

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该调查还发现，去年有51%的职业高中生尝试吸烟，比2005年增加了11%。

The survey also found 51 percent of vocational high school students tried to smoke last year, 11 percent higher than in 2005.

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目的了解影响中学生尝试吸烟的因素，为开展中学生健康教育提供参考依据。

Objective To investigate the risk factors for attempt at smoking among middle school students, and to provide evidence for health education implementation .

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