ผลลัพธ์ (ภาษาอังกฤษ) 3:
Causes of insomnia, lack of sleep caused by stress in learning, because studying hard do cause stress when people nervous, it will make the brain work. For example.
.Example 2 most people arrange time not the class and time is important if we don't know the time in learning of the day we when we may need to get work done that we could not sleep.