今天考鸭们就来和小航学习一下，与熬夜和失眠相关的词汇。

　　1. insomnia /ɪn'sɒmnɪə/

　　n. 失眠(症)

　　e.g. One-third of adults have problems sleeping and suffer from insomnia.

　　e.g. Studies have found that college students who procrastinate are far more likely to suffer from immune system and gastrointestinal problems, as well as serious cases of insomnia.

　　补充：gastrointestinal 肠胃的

　　注：insomnia 指的是：the condition of being unable to sleep, over a period of time: 指的是一段时间或者长期的入睡困难问题，是一种疾病。

　　如果只是某一天突然没有睡好，可以直接用：I did not sleep well. 或者 I could not sleep last night.

　　2. toss and turn

　　(因无法入睡而)辗转反侧

　　e.g. She was tossing and turning all night.

　　e.g. I'm usually awakened soon after I fall asleep, and then I toss and turn all night.

　　如本季度口语话题：

　　Do you often stay up late?

　　e.g. Well, not very often. But whenever an important event is coming up, I tend to toss and turn all night thinking about it.

　　3. groggy /'grɒgɪ/

　　adj.(因疲劳、生病等)摇摇晃晃的，昏昏沉沉的

　　e.g. I feel groggy now because I did not sleep well last night.

　　e.g. A catnap will quickly refresh you and stop you from feeling drowsy and groggy.

　　补充：catnap 小憩;午睡

　　如本季口语话题：What does it feel like the next morning if you stay up late?

　　e.g. I feel groggy and so exhausted when I wake up. And I do not feel like working as my mind is slow and foggy.

　　补充：foggy 不清楚的;模糊不清的

　　4. jet lag /'dʒət læg/

　　Definition: the feeling of tiredness and confusion that people experience after making a long journey in an aircraft to a place where the time is different from the place they left. 飞行时差综合征

　　e.g. I felt completely disoriented with the jet lag.

　　e.g. I staved off jet lag with a bath and a sound sleep.

　　补充：disoriented 迷迷糊糊的;迷失方向的

　　stave off 延缓