translation.en: If we're talking about geometric shapes, with specific, culturally recognized, agreed-upon meanings, than we could very well be looking at one of the oldest systems of graphic communication in the world.
translation.zh: 说到有特定意义的、 被多种文化所认同的几何图形， 我们就要好好研究一下 世界上最古老的图形交流系统之一。