Until recently, this small fold of tissue in the middle of the brain was depicted as neatly divided into four distinct areas.

直到最近，这个位于大脑中部的东西，被描绘为整齐划分成四个不同区域的小折叠组织。

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The brain is divided into two roughly symmetrical hemispheres, sometimes called right and left brains.

整个大脑分为两个大致对称的半球，有时被称为右半脑和左半脑。

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A scientist pours a solidifying substance onto the frozen brain (left), so that it maintains its shape and can be easily divided into smaller sections.

科学家将凝固物质倒入左图中冰冻的大脑上，这样大脑就在能在保持原来形状的前提下轻松被分成更下的块。

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Then they divided the whole brain into small sections with a three-dimensional grid and recorded the activity in each section of the grid for each second.

WSJ: How the Brain Really Works | Mind & Matter by Alison Gopnik