The content of study included the relation between the length of long string insulators and U 50% of the artificial pollution power frequency withstand voltage;

其研究内容包括绝缘子串长与50%人工污秽工频耐受电压关系；

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Lehmann, the lead author of the paper which is published in the journal Nature Geosciences, said that the black carbon content of soils in the study ranged from zero to 82 percent of soil organic carbon.

CNN: Soil study hints at climate model revision

The authors of the study warned of the high sugar and fat content of chocolate.

BBC: Chocolate may protect the brain from stroke

Commissioned as part of the UNESCO-USA-Brazil project Teaching Respect for All and carried out in cooperation with the Centre of Human Rights Education, Lucerne, Switzerland, the study also makes recommendations in terms of content, methodology, usability and process for the future development of education materials against racism, discrimination and intolerance.

UNESCO: EDUCATION