大脑在快速动眼睡眠中和完全清醒时一样活跃

【句子展示】

The brain is as active during REM (rapid eye movement)sleep—whenmost vivid dreams occur —as it is when fully awake,says Dr. Eric Nofzinger at the University of Pittsburgh.

【句子分析】

单词短语：

vivid：生动的

句式结构：

The brain is asactive during REM (rapid eye movement) sleep（宾语从句）—when most vivid dreams occur —as it is when fully awake（比较状语从句）,says Dr. Eric Nofzinger at the University of Pittsburgh.

参考译文：

匹兹堡大学的埃里克博士说，大脑在快速动眼睡眠中——大多数清晰梦境出现的时刻——和完全清醒时一样活跃。