语言是人与人之间相互传达感情、信息及思想交流的重要工具。它的发展是逐步渐进的。两三个月大的宝宝,当他吃饱、睡足、精神很好时,与他四目相交后,只要稍动嘴巴,使嘴形有所变化,他很快就会学着噘起小嘴,发出“哦哦”、“哦咕哦咕”的声音(喉音),同时出现丰富的脸部表情变化,这样子的对话有时会持续二三十分 Language is an important tool for people to communicate their feelings, information and ideas. Its development is gradual. Two or three months old baby, when he is full, sleepy, good spirit, and his eyes intersect, as long as a slight movement of the mouth to make a change of mouth shape, he will soon learn to play a small Mouth, “Oh oh”, “Oh my god goo” voice (guttural), at the same time there is a rich facial expression changes, such a dialogue sometimes lasted twenty-thirty