translation.en: If you want to know what I have to say about Darwinism itself, I'm afraid you're going to have to look at my books, which you won't find in the bookstore outside.
translation.zh: 如果你想知道我对达尔文主义的看法， 恐怕你必须看我的书， 那本你无法在外面的书店找到的书。