A nano nap is a period of sleep which lasts between 15 and 30 seconds. It is generally involuntary, and often occurs when people are incredibly tired and bored. Many office workers and students are familiar with the concept, thanks to falling asleep during meetings and classes.
打盹儿指持续时间在15到30秒之间的小睡状况。这种睡眠状况一般是无意识的,多数是在大家极度疲劳和无聊的时候出现的。不少办公室员工和学生都对这个词很了解,由于他们常常会在开会或者上课的时候打盹。