名词
中文翻译：合作指数
同义词：
['cooperation index', 'index of collaboration']
例句：
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1. The index of cooperation between the two countries has improved significantly.
两国之间的合作指数有显著提高。
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2. The index of cooperation is a crucial factor in determining the success of a project.
合作指数是决定项目成功的关键因素。
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3. The index of cooperation between the two companies has been on the rise recently.
两家公司的合作指数最近一直在上升。