softback

例句：

1. 1. This book has a softback cover, which makes it easy to carry.
   这本书有软面封面，这使得它很容易携带。
2. 2. The author chose a softback edition for its durability and ease of use.
   作者选择软面版是因为它的耐用性和易用性。
3. 3. Many students prefer the softback version of textbooks because it is more comfortable to read.
   许多学生更喜欢教科书的软面版，因为它更舒适地阅读。