Sweet dreams

　　Are these dreams full of cake and candy? No! This expression is used to wish someone a good night's sleep with pleasant dreams. It is often said to a loved one just before he or she goes to bed: "Sweet dreams, my love!"

　　Reoccurring nightmare

　　These dreams are definitely not sweet! Nightmares are dreams that are scary. If you have the same nightmare over and over, it's called a reoccurring nightmare.

　　Hit the hay

　　When someone tells you it's time to hit the hay, relax! It doesn't mean you have to go out to a barn or do any physical work. Mattresses in the West used to be filled with hay - so this just means it's time to go to sleep.

　　Heavy/light sleeper

　　Are heavy sleepers typically big and tall while light sleepers are small and thin? Of course not! Heavy sleepers are people who sleep very deeply and do not wake up easily. For light sleepers, the opposite is true. They can wake up even from the slightest noise.

　　Sleep like a log

　　Imagine a log - heavy and difficult to move. If someone is sleeping like a log, they are sleeping very deeply without lots of tossing and turning. For example, you may say, "I'm so tired from all that exercise that I'll sleep like a log tonight!"

　　Sleep in

　　If someone says they like to sleep in, then it's best not to call them too early in the morning. This expression is used when a person wakes up very late. For example, "I sleep in every weekend and wake up around noon."

　　Power nap

　　Do you ever feel exhausted in the middle of the day? If so, a power nap may be just the remedy for you! While sleeping for several hours can leave you feeling even sleepier, a short power nap of no more than 30 minutes should revitalize you.

　　Insomnia

　　Some people can fall asleep almost anywhere, while others lay awake at night wishing they could. A person who can't easily fall asleep has insomnia and is called an insomniac.

　　Doze off

　　Sometimes, when we're especially tired, we somehow slip off to sleep without meaning to. This is called dozing off. Perhaps you doze off while you're watching TV, reading a textbook or even in class or at work!

　　英语分类词汇

　　译文：

　　Sweet dreams

　　是意味著在你的梦中有许多的蛋糕与糖果可以吃吗？并不是如此！这要表达的是祝福某人在夜晚睡觉时能有一个好梦。通常也对自己亲爱的人在他或她上床前对他们说："Sweet dreams, my love!"

　　Reoccurring nightmare

　　这些梦绝对是令人不舒服的！Nightmares指的是ㄧ些可怕的梦。如果你ㄧ再梦到相同的噩梦，就称为reoccurring nightmare。

　　Hit the hay

　　当有人告诉你现在是时候hit the hay，放轻鬆！它的意思不是说你要到一个穀仓或做一些工作。在西方国家裡习惯在垫褥裡面填满很多的乾草-因此这个意思就正好是说该上床睡觉了。

　　Heavy/light sleeper

　　那是不是称人是heavy sleepers就是指又大又高当称人是light sleepers是不是就是指又小又瘦呢？当然不是啦！Heavy sleepers就是指睡得非常熟然后不容易醒来的人。对于 light sleepers，就正好相反。他们甚至可以被一些微忽极微的噪音而吵醒。

　　Sleep like a log

　　熟睡像块木头 ，想像一下有一个圆木-很重而且很难移开。当某一个人是sleeping like a log，他们正睡得非常熟而且根本就没有几次的tossing and turning。例如，你可以说， "I'm so tired from all that exercise that I'll sleep like a log tonight!" 我太累不能动了，今晚睡的像块木头。

　　Sleep in

　　如果某些人说他们喜欢sleep in，那最好就不要在早晨太早打电话给他们。这通常表示一个人很晚起床。例如，"I sleep in every weekend and wake up around noon."

　　Power nap

　　你是否曾经在日正当中时感到精疲力竭呢？如果是的话，power nap也许正好可以帮助你！当你睡很多小时的时候会将你感到更想睡觉，一个不超过30分钟短暂的power nap将会使你恢复活力。

　　Insomnia

　　有一些人到哪裡都可以睡著，。但有些人不容易睡著就是得了insomnia被称为是ㄧ位insomniac。

　　Doze off

　　有些时候，当我们特别累的时候，我们无意识到自己已经睡著了。就称为dozing off。当你正在看电视、阅读一本教科书或者甚至在上课中裡或是在工作中，你也会doze off！