Let’s take a look. Sleep debt is the cumulative effect of not getting enough sleep. A large sleep debt may lead to mental and/or physical fatigue.

睡眠负债(sleep debt)指长期睡眠不足产生的影响。睡眠负债过多可能会导致精神或身体疲惫。原来这就是“睡眠负债”，那么导致“睡眠负债”的原因，又或者说导致这种情况出现的来源又有哪些呢?别着急，我接着来看看下面的内容。

There are presumed to be two kinds of sleep debt, caused by partial sleep deprivation or total sleep deprivation. Partial sleep deprivation occurs when a person sleeps too little for many days or weeks. Total sleep deprivation means being kept awake for days or weeks.

睡眠负债的来源有两种：部分睡眠不足和整体睡眠不足。前者指一个人连续几天或几周每天都睡很短的时间;后者则指一个人连续几天或几周不合眼。几天或者几周不睡觉?这样的睡眠状况真的很糟糕，长期处于这样“睡眠负债”状况肯定会造成一定的影响的。

It may cause emotional upset, compromise work performance,weaken memory, alertness, attention as well as judgment. It may also speed up one’s ageing process and lead to other types of diseases.

长期处于睡眠负债的状况中，不但会影响情绪、工作表现、还会减低记忆力、警觉性、注意力和判断力、并且加速老化，甚至引发其它疾病。