translation.en: It's only later that we start to see these pictographs become more stylized, until they almost become unrecognizable and that we also start to see more symbols being invented to represent all those other missing words in language -- things like pronouns, adverbs, adjectives.
translation.zh: 后来这些象形图画才变得不那么写实， 直到无法辨识。 同时，人们发明了更多符号， 用来代表语言中的其他词汇， 比如代词、副词和形容词。