用英文来说一则最近发生的新闻

Graduate brain drain threatens poorest nations, says OECD

（世界经济与发展组织指出贫穷国家的人才外流已严重制约了这些国家的发展）

According to The Financial Times :More than half of known graduates from some of the world"s poorest nations are living abroad in a brain drain that threatens the countries" long-term development, the Organisation for Economic Co-operation and Development warned yesterday. In a report entitled Trends in International Migration, the rich countries" think-tank （智囊团、知识界）fears "the possibility that emigration of highly skilled workers may adversely（相反地，不利地）affect small countries".