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来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/04/29 06:32:30

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The World Trade Organisation is trying to finalise an agreement to lower trade barriers before the end of this year,but these efforts have been in train since 2001

世界贸易组织正在努力于今年年底前完善一项协议,减少贸易障碍,但这些努力自2001年就在进行了.

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