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。
People in countries with high suicide rates say they are unhappier, according to the "World Database of Happiness" maintained by Erasmus University in Rotterdam.
而荷兰鹿特丹大学提供的“世界幸福感数据库”显示，自杀率高的国家的人们声称他们感到不幸福。
The authorities at the World Database on Happiness have surveyed levels of happiness in different countries.
“世界幸福数据库”的专家调查了不同国家的快乐程度。
The authorities at the World Database on Happiness have surveyed levels of happiness in different countries.
“世界幸福数据库”的专家调查了不同国家的快乐程度。
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