translation.en: In order to pull glamour off, you need this Renaissance quality of sprezzatura, which is a term coined by Castiglione in his book, "The Book Of The Courtier."
translation.zh: 为了顺利的呈现出魅力，你需要这种sprezzatura的文艺复兴 的特性，这个词语的典故是Castiglione在一本书 “廷臣之书。”