当前的研讨现已从直接做试验比拟人在纷歧样时刻段的回忆力，转变为经过丈量人的压力应激激素（stress related hormone）在一天中的纷歧样水平，间接地剖析回忆力跟着时刻的改变。
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但它们感受到了压力的时候，它们的应激激素会持续比正常小老鼠的要偏高并且持续更久些。
But when they were subjected to stress, the level of stress hormones remained high much longer than in normal mice.
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.
神经系统感受到源源不断的压力，便持续释放应激激素。
The nervous system senses continued pressure and pumps out stress hormones over an extended period.
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