模仿文本： There are fresh calls for governments around the world to tax unhealthy foods to help tackle rising levels of obesity. In the past there's been a lot of media attention focusing on the problems caused by obesity in rich nations, but now researchers at the British think tank, the Overseas Development Institute say the number of overweight and obese adults in developing countries almost quadrupled between 1980 and 2008. 

 

译文：  新近又有人呼吁各国政府要针对不健康食品加税以帮助解决日益增长的肥胖问题。过去许多媒体关注的焦点都在富裕国家中因肥胖导致的问题， 但是现在英国一家叫海外发展机构的智囊团体的研究人员称发展中国家超重和肥胖的成人数在1980年到2008年间几乎翻了四倍。