VOA慢速英语:午睡可以改善学习和记忆

nap – n./v. to sleep briefly especially during the day

chronic – adj. continuing or taking place again and again for a long time

lazy – adj. not liking to work hard or to be active

brag – v. to talk about yourself or your successes in a way that shows you are more important or better than other people

luxury – n. something that is helpful or welcome and that is not usually or always available

geriatric – adj. of or relating to the process of growing old and the medical care of old people

sleep inertia – n. the state of not being able to think or act clearly immediately after waking from sleep.

foggy – adj. unsure or confused

confused – adj. unable to understand or think clearly