The second is a homeostatic process, which regulates the length of shut-eye.

第二个是自我平衡的过程，它调节闭眼的时间。

Instead of a snack, they need some shut-eye.

此时他们需要的是闭眼休息而不是来点零食。

Think you do just fine on five or six hours of shut-eye?

想想在闭上眼睛的五六个小时里你睡得好吗？

In other words, don't expect eight hours of shut-eye to help you on a pop quiz.

换句话说，别指望八小时的睡眠能帮你在突击测试中取得好成绩。

However, stealing a few minutes of unscheduled shut-eye does have its drawbacks.

然而，无规律地抽几分钟时间闭目养神，确实也有不足之处。