下载地址：
http://unctad.org/en/PublicationsLibrary/tdr2020_en.pdf
http://unctad.org/en/PublicationsLibrary/tdr2019_en.pdf
http://unctad.org/en/PublicationsLibrary/tdr2018_en.pdf
http://unctad.org/en/PublicationsLibrary/tdr2017_en.pdf
http://unctad.org/en/PublicationsLibrary/tdr2016_en.pdf
http://unctad.org/en/PublicationsLibrary/tdr2015_en.pdf
http://unctad.org/en/PublicationsLibrary/tdr2014_en.pdf
http://unctad.org/en/PublicationsLibrary/tdr2013_en.pdf
http://unctad.org/en/PublicationsLibrary/tdr2012_en.pdf