translation.en: If however, you bought some wool from the shepherd and charged a premium for converting it into a hat, you weren't actually creating value, you were exploiting the shepherd.
translation.zh: 但如果你从牧羊人那里买了羊毛， 并再卖出以羊毛制造的帽子时要求额外的费用， 你并没有创造价值， 你只是在剥削那牧羊人。