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Gray matter helps you think and learn. 灰质帮助你思考和学习。
Although the scan showed reduced gray matter in certain regions, the doctor explained that many factorssleep, stress, and agecan influence these findings. 尽管扫描显示某些区域的灰质减少，医生解释说许多因素睡眠、压力和年龄都可能影响这些结果。
gray（灰色的）+ matter（物质、组织）。早期解剖学观察发现：在大脑与脊髓中，某些区域颜色较深、呈灰褐色，便以“灰色的组织/物质”来命名，即 gray matter。后来在口语中进一步引申为“脑力、智慧”，相当于说“动动脑子”。
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