In years with hotter weather pupils are likely to perform less well in exams, says a major study from researchers at Harvard and other US universities.

　　哈佛大学和其他美国大学的研究人员进行的一项重要研究表明，在天气过热的年份，学生可能在考试中表现不佳。

　　There is a "significant" link between higher temperatures and lower school achievement, say economic researchers.

　　经济研究人员表示，高温与低学习成绩之间存在“重要”联系。

　　An analysis of test scores of 10 million US secondary school students over 13 years shows hot weather has a negative impact on results.

　　对美国10万中学生超过13年的考试成绩分析显示，炎热的天气对考试结果有负面影响。

　　The study says a practical response could be to use more air conditioning.

　　该研究表示，实际应对办法可以是更多地使用空调。

　　Students taking exams in a summer heat wave might have always complained that they were hampered by the sweltering weather.

　　夏季暑热考试的学生可能总是抱怨说，他们的表现受到了天气闷热的阻碍。

　　But this study, from academics at Harvard, the University of California Los Angeles (UCLA) and Georgia State University, claims to have produced the first clear evidence showing that when temperatures go up, school performance goes down.

　　但是，这项来自哈佛大学，加利福尼亚大学洛杉矶分校(UCLA)和乔治亚州立大学的研究声称已经获得了第一个明确的证据，即当气温上升时，学校表现会下降。

　　Researchers have tracked how secondary school students performed in tests in different years, between 2001 and 2014, across the different climates and weather patterns within the US.

　　研究人员追踪了2001年至2014年间不同年份的中学生在不同气候和天气模式下的测试表现。

　　The study, published by the US National Bureau of Economic Research, found that students were more likely to have lower scores in years with higher temperatures and better results in cooler years.

　　这项由美国国家经济研究局发布的研究发现，在气温较高的年份，学生的年级得分较低，而在较冷的年份，学生的成绩会更好。