softcovers
n. 软封面( softcover的名词复数 )
A softcover is a book with a thin cardboard, paper, or plastic cover.
...this set of 6 softcover books.
由6本平装书组成的这套书
...her cookbook, which Macmillan is bringing out in soft cover this month.
本月麦克米伦公司将为她的烹饪书推出平装本