符号
From Wikipedia, the free encyclopedia
拉一种认知体系中，符号是指代一定意义个意象，可以是图形图像、文字组合，也可以是声音信号、建筑造型，甚至可以是一种思想文化、一个时事人物。例如“=”拉数学中是等价个符号。
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