本期文章 5-8 http://www.america.govpublications/ejournalusa/0708/-5-8.html.rss 凝聚全美国的特殊地方 http://www.america.govhttp://www.america.gov/st/diversity-chinese/2008/August/20080916102810cmretrop9.310549e-02.html?CP.rss=true http://www.america.govhttp://www.america.gov/st/diversity-chinese/2008/August/20080916102810cmretrop9.310549e-02.html?CP.rss=true Fri, 19 Sep 2008 15:57:04 -0400 美国国家公园中的风景与科学 http://www.america.govhttp://www.america.gov/st/diversity-chinese/2008/August/20080915152411cmretrop0.2587854.html?CP.rss=true http://www.america.govhttp://www.america.gov/st/diversity-chinese/2008/August/20080915152411cmretrop0.2587854.html?CP.rss=true Fri, 19 Sep 2008 15:58:08 -0400 气候的变化 http://www.america.govhttp://www.america.gov/st/diversity-chinese/2008/August/20080916103051cmretrop3.847903e-02.html?CP.rss=true http://www.america.govhttp://www.america.gov/st/diversity-chinese/2008/August/20080916103051cmretrop3.847903e-02.html?CP.rss=true Fri, 19 Sep 2008 15:59:06 -0400 全人类的遗产 http://www.america.govhttp://www.america.gov/st/diversity-chinese/2008/August/20080916103121cmretrop0.0139429.html?CP.rss=true http://www.america.govhttp://www.america.gov/st/diversity-chinese/2008/August/20080916103121cmretrop0.0139429.html?CP.rss=true Fri, 19 Sep 2008 16:00:06 -0400