VOA慢速英语:Sleep Helps Us Learn

synapse – n. the point at which a nervous impulse passes from one neuron to another

hypothesis – n. an idea or theory that is not proven but that leads to further study or discussion

refresh – v. to restore or maintain by renewing supply

reset – v. to set again or anew

manually – adv. of or relating to using the hands

upset – v. to disturb or overturn a natural or stable order

malleable – adj. capable of adapting to varying conditions

respond – v. to have a particular reaction to something

stuffed – adj. informal describes a feeling that you have eaten too much : v. to fill (something) so that there is no room for anything else