Eph into seven little sleep and rest rules commandment: lack of sleep sleepy body rash free, easy to create pseudo-myopia.

七睡眠弗成太少，作息规戒律：睡眠不足身体随意草率疲困，易造成假性近视。

youdao

They are alert at bedtime and sleepy when it is time to get up, and this may have nothing to do with how fatigued their bodies are, or how much sleep they must take to lose their fatigue.

他们在睡觉的时候很清醒，到了该起床的时候很困倦，这可能与他们的身体有多疲劳，或者需要多少睡眠才能消除疲劳无关。

youdao

Typically, the preferred sleep cycle is delayed in adolescents, which leads to many students not feeling sleepy until much later in the evenings.

通常，青少年的睡眠周期会延迟，这导致许多学生直到晚上很晚才感到困倦。

youdao

Yes. When we get sleepy we'll sleep. Now hush."

是的，困了我们就睡，“,“不要说话了，“

耶鲁公开课 - 1945年后的美国小说课程节选

Professor Jim Horne, of the Loughborough University Sleep Research Centre, said the tendancy to feel sleepy in mid-afternoon was probably a legacy of our distant past.

BBC: How we go to sleep

If snoring is combined with feeling sleepy during the day and experiencing pauses in breathing during sleep, people may be suffering from the more serious sleep apnoea - which affects 10 to 20% of snorers - and should see their GP.

BBC: Snoring cures success 'exaggerated'