salt the book

例句：

1. 1. She added salt to thesoup to make it taste better.
   她给汤里加了盐，让它更好吃。
2. 2. Thechef seasoned the meat with salt andpepper before cooking it.
   厨师在烹饪前用盐和胡椒调味了肉。
3. 3. Saltingthe books is a common practice in librariesto preserve them for years.
   图书馆中常见的做法是在书籍上加盐以保存它们多年。