translation.en: I am of course quoting from a famous essay by Leonard Read, the economist in the 1950s, called "I, Pencil" in which he wrote about how a pencil came to be made, and how nobody knows even how to make a pencil, because the people who assemble it don't know how to mine graphite, and they don't know how to fell trees and that kind of thing.
translation.zh: 的确我要引用1950年代的经济学家， 伦纳德·里德Leonard Read的著名作品里的话， “我，铅笔”。 他写道铅笔是怎样被制做的， 竟然没人知道铅笔怎样被制成的， 缘于人们生产铅笔，却不知道怎样开采石墨。 人们也不知道怎样砍伐树木等等类似的事情。