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2000年8月6～17日将在巴西里约热内卢召开的第三十一届国际地质大会的主题是:第三个千年的挑战:地质和可持续发展。而于2003年在美国召开的第十六届国际第四纪大会的主题是:下
The theme for the Thirty-first International Geological Congress to be held in Rio de Janeiro, Brazil, from 6 to 17 August 2000 is: Challenges for the Third Millennium: Geology and Sustainable Development. The theme of the 16th International Quaternary Conference held in the United States in 2003 is as follows: