【难句】5. Even China’s population will be declining by the early 2030s, according to the UN, which projects that by 2050 populations will be lower than they are today in 50 countries. (The Economist Jun.5, 2006)

【结构分析】 本句结构清晰，是一个复合句。主句为Even China’s population will be declining by the early 2030s, according to the UN，其后的定语从句which projects that by 2050 populations will be lower than they are today in 50 countries修饰先行词UN，关系代词在从句中作主语，注意这里project作动词用，译为“指出”，且从句里使用了比较级。

【参考译文】联合国有关报告指出，即便是中国，到2030年初期人口也将开始递减。这份报告同时还指出，到2050年，将有50个国家的人口低于今天的水平。