many of you are showing irregular beta waves suggesting intense comprehension and great intellectual focus.

现在你们很多都是不规则的β波,表明理解力很高,思维很集中。

耶鲁公开课 - 心理学导论课程节选

Then you get successively deeper, II through IV, slow, irregular, high amplitude delta waves, and then once you reach stage IV you start going up again, up through stage III and II.

然后睡得越来越深，从第二到第四阶段，慢，不规则，高振幅的δ波，等你到达第四阶段，你又开始返回，第三阶段和第二阶段。

耶鲁公开课 - 心理学导论课程节选