translation.en: Our own research, now it's 2,000 years later, when the brain is awake and is at its most busy, it puts off clearing away the waste from the spaces between its cells until later, and then, when it goes to sleep and doesn't have to be as busy, it shifts into a kind of cleaning mode to clear away the waste from the spaces between its cells, the waste that's accumulated throughout the day.
translation.zh: 2000年后，我们自己的研究证明了 大脑清醒时 所发生的一切。 在大脑紧张工作时， 它一直将清理那些 细胞空隙间的废物的工作推迟。 然后，在大脑要睡觉时 它不必那样紧张工作， 大脑就切换到了“清理模式”， 开始清理 脑细胞间隙之间 已经积累了一天的废物。