Eng: How they

How they all related

它們是如何相互關聯的

How they are written

怎麼寫的

How they can do it

他們要如何辦到

How they do it

他們要如何辦到

How they relate

它們之間的關係

How they relate to the flow of the book

它們如何與書的流程相關

How they related to each other

它們是如何相互關聯的

How they will do it

他們要如何辦到