以上来源于: WordNet
A Dutch scholar, Ruut Veenhoven, has created a World Database of Happiness, including national rankings.
荷兰学者，拉特维荷芬，创造了一个包括国家等级在内的世界幸福数据库。
Its director, Ruut Veenhoven, has made his life's work researching which nations are home to the happiest citizens.
数据库主管鲁特·范荷文毕生都在研究哪个国家的人生活得最幸福。
Its director, Ruut Veenhoven, has made his life's work researching which nations are home to the happiest citizens.
数据库主管鲁特•范荷文毕生都在研究哪个国家的人生活得最幸福。
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