根据瑞士保罗·谢勒研究所对近三十年世界范围内超过1800其事故的研究结果，煤炭行业是最危险的(见左边底部)。
In developed countries, coal is the most hazardous (bottom left), according to the Paul Scherrer Institute in Switzerland, which studied more than 1, 800 accidents worldwide over nearly 30 years.
根据瑞士保罗·谢勒研究所对近三十年世界范围内超过1800其事故的研究结果，煤炭行业是最危险的(见左边底部)。
In developed countries, coal is the most hazardous (bottom left), according to the Paul Scherrer Institute in Switzerland, which studied more than 1, 800 accidents worldwide over nearly 30 years.
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