媒介可分为传播符号和传播平台两个层面。媒介的更叠既有传播符号的发展变化引起的,也有因为传播平台的更新换代产生的。媒介传播符号的发展变化具有明显的承继性、稳定性。媒介平台的发展是跳跃的、不稳定的。媒介符号形态的发展是遵循拟真具象符号——抽象符号——记真具象符号轨迹的。媒介的发展有记真化、环境化趋势。将来可能有些媒介会由物理的转化为物理——生理式的,它侵入到我们的有机体中,产生亦真亦幻的效果。%Media can be divided into two levels of communication symbol and communication platform. Ac- cordingly, the change of media can be aroused either by the development of communication symbol or communica- tion platform. The development of communication symbol has remarkable feature of heritage and stability. Tile de- velopment of media platform is bouncing and unstable. The media symbol form develops in a process from quasi - true material sign to abstract symbol and then to truth - recording material sign. The development of media has truth - recording and environmental tendency. In the future, some media may change from a physical one to a physical and physiological combination. It invades our organic body and produces a half true and half' imagery effect.
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