如果你需要的书借出去了，你可以在书还回来时请求为你保留。
If the books you need are out, you may ask for them to be kept for you when they are returned.
这家公司不仅记录了你买的书，而且还保留了你浏览过但却没有购买的网页记录，从而帮助它向你推荐其他的书。
It not only tracks the books you purchase, but also keeps a record of the ones you browse but do not buy to help it recommend other books to you.
你可以保留你找到的任何书。
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