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.

睡眠負債(sleep debt)指長期睡眠不足產生的影響。睡眠負債過多可能會導致精神或身體疲憊。原來這就是“睡眠負債”，那么導致“睡眠負債”的原因，又或者說導致這種情況出現的來源又有哪些呢?別著急，我接著來看看下面的內容。

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.

睡眠負債的來源有兩種：部分睡眠不足和整體睡眠不足。前者指一個人連續幾天或幾周每天都睡很短的時間;后者則指一個人連續幾天或幾周不合眼。幾天或者幾周不睡覺?這樣的睡眠狀況真的很糟糕，長期處于這樣“睡眠負債”狀況肯定會造成一定的影響的。

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.

長期處于睡眠負債的狀況中，不但會影響情緒、工作表現、還會減低記憶力、警覺性、注意力和判斷力、并且加速老化，甚至引發其它疾病。