文字是书面语言,是口头语言之外最重要的语言。文字的产生和发展是由它的基本功能所决定的。口头语言虽然产生早、使用广泛,但它的易逝性和局限性却是其致命弱点:口语声波一经出嘴,瞬间即逝,即使记忆力极强之人也不能全部久记不忘;口语声波传播距隔有限,百米之外即使喊叫也难于听清。口语不能久留和远播的缺陷才驱使人类逐渐创造了既可久留又可远播的文字语言。久留和远播是文字语言的基本功能。久留,才能使后人更好地了解历史;远播,才能使域内更好地了解外域。这样才能使人更好地学习间接知识。 历史是个长河,外域是个大海。如果人 Text is a written language, is the most important language outside of spoken language. The production and development of words are determined by its basic functions. Oral language, although produced early, is widely used, but its perniciousness and limitations are its achilles heel. As soon as the oral acoustics emerges from the mouth, the fleeting moment, even if the memory is extremely strong, can not remember them all; Spread limited, even outside the hundred meters are hard to hear clear. The shortcomings of spoken language can not stay long-term and far-sowed to drive the gradual creation of a language that can be long-lasting and far-sighted. Long stay and far-sowing is the basic function of language. Long stay in order to enable future generations to better understand history; far-sowing, in order to make the territory better understand the outland. This will enable people to learn better about indirect knowledge. History is a long river, outside the domain is a sea. If people