阅读下面的短文，将划线部分的句子译成汉语。

     1 Dreams may be more important than sleep. Some people don't need very much sleep. But we all need to

dream, scientists say. 

     2 Dreams take up about one quarter of our sleeping time. People have several dreams each night. Dreams

are like short movies. They are usually in color. Some dreams are like old movies. They come to us over and

over again. That may be because the dreamer is worrying about something. 3 Dreaming may be a way of trying

to find an answer.

     Some people get new ideas about their work from dreams. They could have been thinking about their work

all day. These thoughts can carry over into dreams.

     Sometimes we wake up with a good feeling from a dream. But often we can't remember the dream. Dreams

can disappear quickly from memory.

     Too much dreaming can be harmful. The more we sleep, the longer we dream. 4 The mind is hard at work

when we dream. 5 That is why we may have a long sleep and still wake up tired.

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