dictation
n
1 [U] action of giving or taking sth dictated 口授; 听写; 命令
shorthand dictation 速记.
2 [C] passage, etc that is dictated 用作口授、 听写的文字
three English dictations 三段英语听写文字.
First the electroencephalograph (which is simply a device for recording the electrical activity of the brain by attaching electrodes to the scalp) shows that while there is a change in the pattern of activity during sleep,