今日话题：韩国睡眠问题【六分钟英语播客】

set a record to do sth 创纪录

doze off 打盹

nod off 打盹

on top of that 除此之外，更糟的是

She set a record by completing a 1000 km butterfly swim in just 15 minutes.

I used to frequently doze off in class when I was a student.

I found myself nodding off during the final 30 minutes of the lecture.

Not only did I miss her call, but on top of that, I also managed to lose her number.