每天约有一百万篇英语撰写的博文，其中大部分是新闻评论、活动策划以及关于人生的个人感悟。
Of the million or so blog entries that are written in English every day, most are comments on news, plans for activities, or personal thoughts about life.
改变身体活动水平在个人以及社会层面上都造成挑战。
Changing the level of physical activity raises challenges for the individual but also at societal level.
我们这几年正在研究其它的因素，例如心理活动，睡眠，婚姻质量，以及个人性格与社会环境的结合。
We are looking at many other patterns across the years, such as physical activity, sleep, marriage quality, and combinations of personality with social situations.
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