symbols system的用法和样例：
例句
- Language is a system of signs that express ideas.
语音是一种表达观念的符号系统。 - As with books, television can employ pictures, diagrams, and other representational symbol systems, but, in TV, these symbols are transient and able to depict motion.
与书本一样，电视可以使用图片，图表和其他具有代表性的符号系统，但是，在电视中这些符号是短暂且可以描绘的。
