1. Some years ago an American psychiatrist named William Dement published experiments dealing with the recording of eye-movements during sleep.
    前些年，美国一位精神病学者发表了一篇报告，报告中记录了眼球在睡眠时的活动情况。

2. But that was precisely the idea adopted in some of the early instruments ( seismometers) for recording earthquake waves.
    但在一些早期记录地震波的仪器（地震计）中，所采用的的确就是这种想法。

3. (which is simply a device 10 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,
    显示，人在睡眠时大脑活动的方式有变化，

4. But that was precisely the idea adopted in some of the early instruments (seismometers) for recording earthquake waves.
    但是早期记录地震波的仪器（地震仪）正是采用了这中思路。