sleepy 犯困的
World Sleep Day 世界睡眠日（3月21日）
The main purposes of sleep are to enable the body to rest and replenish, allowing time for repairs to take place and for tissue to be regenerated.
睡眠的主要目的是让身体休息、补充，有时间让组织修复和再生。
One of the secrets to be more productive more inspired and more joyful in life is getting enough sleep. 让你感到有效率、有灵感、开心的秘诀就是充足的睡眠。
Lack of sleep can compromise the immune system, muddle thinking, cause depression, and increase anxiety and irritability. 缺乏睡眠会影响免疫系统、思维换乱、导致抑郁、增加焦虑和恼怒。
high-tech and fast-paced lives 高科技、快节奏
《盗梦空间》
muscles relax 肌肉放松
In the next two stages, sleep gets progressively deeper. 在接下来的两个阶段，逐渐进入了深度睡眠。
confused and disorientated 困惑、迷惘
sleepwalking 梦游
In the fifth stage, the rapid eye movement stage, the eyes move constantly between closed lids as if the sleeper is looking at something. 在第五阶段，眼睛在眼皮下快速地不停地转动，好像在看东西。
paralyzed 瘫痪
expert 专家
special habit 癖好
take a hot bath 洗热水澡
As your body cools down from your bath, the changing temperature will help you sleep. 洗完澡之后体温降下来，体温的变化有助于睡眠。
close the curtains 拉窗帘
sleep disorder 失眠
It’s true alcohol can make you fall asleep very quickly but it’s not good for maintaining sleep. 酒精确实可以使你很快入睡，但是不能维持很好的睡眠状态。
sleep in 睡懒觉
Deep sleep stages may be suppressed at the beginning and you may end up waking up more throughout the night. 起初深度睡眠阶段可能被抑制，一个晚上会总醒。
Sleeping patterns change with age, which is why many people over 60 develop insomnia.
睡眠模式随着年龄而改变，这是为什么60岁以上的人会失眠。
One theory for this age-related change is that it is due to hormonal changes.
一个理论是年龄相关的变化是由于荷尔蒙的变化产生的。
The body temperature rise occurs at daybreak in the young, but at three or four in the morning in the elderly.
年轻人在黎明的时候体温升高，而老年人是在凌晨三四点的时候。