据最新的研究，12到17岁的26个男生和26个女生参与了一系列旨在衡量各级咖啡因的作用的试验。
In the latest study, 26 boys and 26 girls, age 12 to 17, took part in a series of experiments designed to measure the effect of various levels of caffeine.
但可以明确的是在小鼠的试验中已证明含咖啡因(提取自咖啡和绿茶)的外用药水可以防止皮肤癌的发生。
Lotions containing caffeine (both from coffee and green tea) have been shown to prevent the occurrence of cancerous tumors on the skin - in murine trials, anyway.
咖啡因可以有效介入改善轮班工作者的工作表现，但没有试验可以让我们评估其对工作伤害的效益。
Caffeine may be an effective intervention for improving performance in shift workers however, there are no trials from which we can assess its effect on injuries.
试验的结果认为，比起无介入情况下，使用咖啡因者是可以减少轮班工作时的工作错误并提升认知能力。
The results of the trials suggest that compared to no intervention, caffeine can reduce the number of errors and improve cognitive performance in shift workers.
试验的结果认为，比起无介入情况下，使用咖啡因者是可以减少轮班工作时的工作错误并提升认知能力。
The results of the trials suggest that compared to no intervention, caffeine can reduce the number of errors and improve cognitive performance in shift workers.
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