translation.en: Every time a young baby learns something new -- to focus its eyes, to mimic a movement or a facial expression, to pick something up, to form a word or to sit up -- new synaptic connections are being built in the brain.
translation.zh: 每当孩子们学到一些新的东西—— 用眼睛关注它， 去模仿一个动作或者一个表情， 起捡起某些东西，说话或是坐起—— 大脑中就建立起了新的突触连接。