The Encyclopaedia body of knowledge is in about 20 major subject categories and spanned by about 200 subject themes. Each theme is on average equivalent to one print volume of 500 standard pages.

• 百科全书知识大全涉及约20 个主要题材范畴，跨越大约200个专业主题，而每一个主题平均相等于500 标准页数的印刷量。