translation.en: Take rodents and primates, for instance: In larger rodent brains, the average size of the neuron increases, so the brain inflates very rapidly and gains size much faster than it gains neurons.
translation.zh: 以啮齿类动物和灵长类动物为例： 在大一些的啮齿类动物大脑里， 神经元的平均尺寸在增加， 所以，大脑非常迅速地膨胀 尺寸增长比获得神经元更加快