In the brain, that is especially critical; its intense electrical activity uses up a quarter of the body's entire energy supply, even though the brain accounts for only about two percent of the body's mass.
对大脑来说，这是至关重要的， 它巨大的电波活动 用尽了身体整个能量供应的四分之一 即使大脑仅仅占据了 人体重量的百分之二。