英譯漢：

　　Keeping a busy social life amongst lots of friends may keep people slimmer than spending hours on a treadmill, according to scientists. They say that socializing and meeting with friends helps boost levels of “brown fat” in the body which burns calories to generate heat. Living in a stimulating, social environment was found to reduce abdominal fat in mice by half over four weeks, even if they ate more. US researchers say that social stimulation aids weight loss by converting white fat into brown. White stores calories and makes us fatter, while brown burns energy to generate heat. Converting white fat into brown is notoriously difficult, normally requiring long term exposure to cold conditions or activating part of the body's nervous system. However, scientists from Ohio State University now think that having a busy social life is an even more effective way of changing white fat into brown.

　參考譯文：

　　科學(xué)家研究發(fā)現(xiàn)，與在跑步機(jī)上鍛煉幾個(gè)小時(shí)相比，跟朋友一起參加社交活動(dòng)更有利于保持苗條身材。研究人員表示，社交活動(dòng)和朋友聚會(huì)能幫助提高體內(nèi)“棕色脂肪”的含量，這種脂肪可以燃燒卡路里，產(chǎn)生熱量。據(jù)發(fā)現(xiàn)，在興奮的社交環(huán)境中生活的老鼠，四周后腹部脂肪減半，即使它們的食量增大。美國(guó)研究者認(rèn)為，社交興奮感可以把“白色脂肪”轉(zhuǎn)化為“棕色脂肪”，從而有助于減肥。“白色脂肪”儲(chǔ)存卡路里，使人們長(zhǎng)胖，而“棕色脂肪”能夠燃燒能量，產(chǎn)生熱量。“白色脂肪”轉(zhuǎn)化為“棕色脂肪”出奇困難，通常需要長(zhǎng)期暴露在寒冷的環(huán)境中，或者激活人體部分神經(jīng)緊張系統(tǒng)。但俄亥俄州立大學(xué)的科學(xué)家認(rèn)為，繁忙的社交生活能更有效地促使“白色脂肪”轉(zhuǎn)化為“棕色脂肪”。