我再需要一本书，这本已经读完了。

I need another book, I've finished this one.

youdao

如果你发现你需要一本书来看或者复习，把它从箱子拿出来重新放到书架上。

If you discover you need a book to read or reference, pull it out of the box and put it back on the shelf.

youdao

但是如果你一定需要一本书的话，就去读一下《长寿的秘诀》，这是一本很不错的书。

But if you do want a book, check out The Longevity Project - it's an interesting read.

youdao