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Scientists believe the brain has special structures to take out this “cellular trash,” especially during sleep.
cellular trash (n) rác thải tế
The brain is very active during sleep. During sleeping hours, the brain appears to clean itself.
active (a) hoạt
Fluid from the brain, called cerebrospinal fluid, travels through channels surrounding blood vessels to carry waste out of the brain.
blood vessel (np) mạch
carry sth out of sth
đưa cái gì ra khỏi cái