求翻译：developed and presented in this article. The proposed model is designed for alternative projects, variants selection, invest-是什么意思？

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悬赏分：1 - 离问题结束还有

developed and presented in this article. The proposed model is designed for alternative projects, variants selection, invest-

问题补充：

匿名	2013-05-23 12:21:38 发达国家和在这篇文章中提出的。该模型是专为替代项目，变种的选择，投资

匿名	2013-05-23 12:23:18 本文介绍的发达国家和。建议的模式是专为备选项目,选择备选案文,投资

匿名	2013-05-23 12:24:58

匿名	2013-05-23 12:26:38

匿名	2013-05-23 12:28:18

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