According to one study, students' academic performance is not the only decisive factor of their stress responses.

根据一项研究，学生的学习成绩并不是他们压力反应的唯一决定性因素。

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Last year,a study in the medical journal Neurology found smoking to be an established risk factor in developing the disease.

VOA: special.2010.03.09

"Exposure to tobacco smoke is a risk factor for cardiac disease already in adolescents, and that's why this study supports that children and adolescents need smoke-free environments."

VOA: standard.2010.03.04

The Grenoble study authors did not factor in influences the warming oceans would have had upon evaporated water vapor, that primary atmospheric greenhouse gas.

FORBES: The Feverish Hunt For Evidence Of A Man-Made Global Warming Crisis

At that time we proposed that menthol merited study as a possible factor contributing to the dramatically higher rates of smoking-related cancers among African Americans.

FORBES: Will Removing Menthol From Cigarettes Improve Health?

Our study indicates that one explanatory factor was whether a country undertook mass privatisation.

ECONOMIST: The British army