阅读下面的短文，将划线部分的句子译成汉语。
1Dreams may be more important than sleep.Some people don't need very much sleep. But we all need to
dream, scientists say.
2Dreams 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. 3Dreaming 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. 4The mind is hard at work
when we dream.5That is why we may have a long sleep and still wake up tired.
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