本篇文章是与睡眠有关的，属于科普知识。美式英语发音，慢速英语。语速正常。可以作为口译入门或基础英语听力口语听写的素材。大家快来挑战自己吧！
答案和解析来啦：
Are you the kind of person that wakes up and always seems to feel tired?
你是否一觉醒来却甚是疲惫？
Sometimes you got eight hours’ sleep, sometimes twelves hours, sometimes 5 hours,
即使有时候睡上八小时甚至十二小时，有时只睡五个小时，
but never mind how well you think you slept you always wake up feeling slightly groggy.
可无论你觉得自己睡得多好，醒来都感到昏昏沉沉，毫无活力。
Don’t worry, you’re not alone.
别担心，不是只有你这个样子。
Let’s now attempt to put things right for you.
让我们来帮助你走回正轨。
While waking up for you is nothing special,
你如往常从床上醒来，
a lot of things happen to your body when you awaken in the morning.
你的身体却在发生着各种变化。
For instance, your heart rate will get faster and your breathing will become quicker.
比如：你的心跳会加快，呼吸更急促。
Your blood flow will increase and your brain will start producing different kinds of brainwaves.
血流量增加，同时你的大脑会产生不同种类的脑电波。
Your liver and kidneys during the night were in sleep mode,
在夜间，你的肝和肾处于睡眠状态，
but when you awake they go back to waking mode.
但当你醒来，它们也切换回唤醒状态。
You basically rev up for the day
根本上说，就是在新的一天激活你的身体
and when you open those eyes of yours the lots of external stimuli will flood your blood.
在你睁开双眼的同时，大量的外界刺激会冲击你的血液。
During the night when you were in sleep mode
当你处于夜间的睡眠状态时
you will have experienced something called REM, or rapid eye movement.
你会经历一种状态叫做REM，即快速眼动。
Most people have about five of these periods during sleep,
大多数人在睡眠过程中会有大约五次快速眼动，
interspaced with non-REM sleep.
与非快速眼动状态交替发生。
If you want to know what REM looks like,
你要是想知道这种情况是如何发生的，
just watch your dog’s eyes flickering when it is enjoying some ZZZs.
可以看看你的狗狗在睡觉的时候，眼睛是怎么转动的。
It’s during these rapid eye movements when you dream,
在你做梦的时候，你的眼睛会快速运动，
and you are in what we call deep sleep.
这种状态也称为深度睡眠状态。
解析在这里哦！
1. groggy，形容词，表示“昏昏沉沉的、身体虚弱的”，比如：She was feeling a little groggy when I saw her. （我看见她时，她正感觉到有一点头晕脑胀。）
2. brainwaves，名词，表示“脑电波”。常用复数。
3. rev up，动词词组，表示“使更积极、更活跃”，比如：The ream are revving up for next week’s game.（这个队伍对下周的比赛跃跃欲试。）
4. REM，是rapid eye movement的缩写，表示“快速眼动”。指的是夜间做梦时眼睛快递而细微的移动。
5. flicker，动词，表示“来回转动”，比如：The tongue of a snake flickered.（蛇伸吐着舌头。）
