Losing a loved one, being chased by a monster or running hopelessly late for a vital appointment - it's all the stuff of nightmares.

　　失去爱人的痛苦、被怪物猎杀或是为了奔赴一个重要约会而拼命奔跑——这些都是噩梦中常出现的情景。

        And for some of us, it's a show of horrors that unfolds most times we go to sleep.

　　对我们当中的一些人来说，噩梦是当我们熟睡时逐渐展现的一种恐惧感。

　　Others claim never to be troubled by dreams of any sort.

　　还有一些人说，他们自己从来没被任何一种梦境困扰过。

        Scientists believe that while the nightmare may not directly correspond to waking life, it can reflect the sleeper's emotions or concerns.

　　他们认为噩梦不一定直接反映了现实生活，它有可能是睡者情感或焦虑的体现。

　　The five most common themes are falling, being chased, feeling paralysed, being late and the death of a loved one.

　　不停的下坠、被人追逐、在梦中吓得不能动弹、迟到、爱人的去世，这是噩梦中最常出现的5种情景。

        Hair or tooth loss and sitting exams are also common themes, even among those too young to go bald and too old to sit exams.

　　还有一些梦境，尤其是对那些很年轻就秃顶的或是一把年纪还要考试的人来说，头发或牙齿脱落、坐在考场中考试，也是很常见的梦境。