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关注：1
2013-05-23 12:21
求翻译：20世纪90年代以来，发展知识经济和循环经济已经成为国际社会的两大趋势。是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
20世纪90年代以来，发展知识经济和循环经济已经成为国际社会的两大趋势。
问题补充： |
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2013-05-23 12:21:38
Since the 1990s, the development of knowledge economy and circular economy has two major trends in the international community.
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2013-05-23 12:23:18
正在翻译，请等待...
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2013-05-23 12:24:58
Since 1990s, the development knowledge economy and the circulation economy have already become the international society two major tendencies.
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2013-05-23 12:26:38
In the 1990 of the 20th century, the development of knowledge economy and circular economy have become two major trends of the international community.
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2013-05-23 12:28:18
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