translation.en: During the first three years of life, the brain grows to its full size, with most of that growth taking place in the first six months. The brain develops in response to experience and to stimulation.
translation.zh: 在刚出生的三年里，大脑逐渐成长 直到成熟，而其中的大部分成长发生在 刚出生的六个月。大脑逐渐的成长 并开始对各种经验及刺激产生反应。