account symbol system的用法和样例：
- Image group is a symbol system which includes many images in poem and has inherence.
- The secularization of aesthetic culture means that it turns essentially from the tradition to the modern society as a vast cultural symbol system.
- Directly opposed to Searle's belief (and to the notion of embodiment mentioned earlier) is the physical symbol system hypothesis of Newell and Simon [Newell &Simon 1976].
- The basic essential factor that folk custom accords with as well as the various symbol system that from this are the kernels that forms the matter of folk custom.