trade paperback
trade-paperback的词性:n.(名词)
1. A paperback book that is typically of better production quality, larger size, and higher price than a mass-market edition, intended for sale in bookstores.平装书:一种平装书籍,以较好的出版质量,大号字以及比大众市场版价高为特点,用来在书店中销售