Learn during sleep.
Meaning: This means that the brain can still learn and process information even while you are sleeping.
Choice of Words: Learn is a verb meaning to gain knowledge or understanding of something. During is a preposition that means at some point in the duration of something. Sleep is a verb meaning to rest with your eyes closed and your body inactive. In this context, "learn during sleep" means that the brain can process and consolidate information while you are sleeping, helping you to remember new things that you have learned.
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