熬夜英语作文六级

Staying up late will be detrimental to human health, because the adrenal cortex hormone and growth hormone are all secreted during the night when people are sleeping. The former is secreted before dawn, which can promote the metabolism of carbohydrate in human body, and protect the development of muscle; while the latter is produced only after sleep, which can not only promote the growth and development of young people, but also can delay the aging process of the elderly. As a result, staying up late will cause a variety of harms to human body.First, frequent fatigue and decreased immunityThe most serious sequence caused by staying up late is fatigue and lack of energy. What's more, the immunity of human body will decrease accordingly. And some other symptoms such as cold, gastrointestinal infections, allergies will also appear.Second, headacheThe next day after staying up late, you will suffer from headache when you are at work or at class. You will be unable to concentrate. What's more, long-term staying up late and insomnia will also bring invisible damage to our memory.Third, dark circles and puffinessNight is the time for human body to have a good rest. Without adequate rest, you will feel extremely tired, which will lead to poor blood circulation around the eyes, causing dark circles or blood streak in the white of the eye.

Jack stayed up late again last night. When he woke up in the morning, it was already too late, though he tried to run as fast as he could, he still didn't catch on the bus. As a result he rushed to school hurriedly.Because of the lack of sleep, Jack couldn't help himself falling asleep in class, which was noticed by the teacher in front and had his name called.

Yestoday Jack stay up for too late,so he got up later than usually . He missed the bus so he rushed to school at once.As a result he wasn't late.But he was too tired to have class,he even slept at class ,then he was called bythe teacher.