名词短语
中文翻译：未被借用的开发中成员国
同义词：
['underdeveloped', 'underutilized', 'underdeveloped countries']
例句：
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1. The under-borrowed developing member countries have been struggling to meet their development goals.
未被借用的开发中成员国一直在努力实现其发展目标。
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2. The under-borrowed developing member countries are often left behind in terms of economic growth.
在经济增长方面，未被借用的开发中成员国往往落后于其他国家。
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3. The under-borrowed developing member countries need more investment and support from the international community.
未被借用的开发中成员国需要国际社会更多的投资和支持。