也有研究表明睡眠不足还会增加引发癌症、心脏病、引起肾上激素上升的风险。

There are also studies demonstrating that a lack of sleep can also increase the risk of cancer, heart disease and an increase in cholesterol levels.

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相反，对于那些认为成绩下降是一种永久的、无法挽回的状态的学生来说，成绩的下降只会预兆着他们应激激素的上升。

Instead, declining grades only predicted worse stress hormones among students who believed that worsening grades were a permanent and hopeless state of affairs.

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不过，这一最新研究首次将日常生活中的压力和负担同应激激素水平的上升联系了起来。

But the latest study is the first to link the phenomenon to the stresses and strains of everyday life and to rising levels of stress hormones.

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