英语听力精选进阶版 13923（在线收听）

Scientists hope to record dreams

Vocabulary

fanciful

unrealistic

to explore

to look at, to find out about

brain cells

the smallest units found in a person's brain

specific

particular

lit up

become more active

volunteers

people who do something for free

associated with

connected with, linked with

make sense of

understand

correlate with

match with

accounts of

stories of