They ranged the books on the shelf.

他们把书架上的书排列整齐。

youdao

Look around you now and draw the cup on the table, or the books on the shelf.

现在看看你画一个桌上的杯子，或者架子上的书。

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Of course, you could wander the shelves until you find a helpful sign, but it's faster to simply look at the books on the shelf next to you. You see.

当然，你可以在书架间穿行直到找到有用的标牌，但更快捷的方法是直接看一眼你身边的书架上都有些什么书。

youdao

How many books are on the shelf?
How many books are on the shelf?

How many课堂 - SpeakingMax英语口语达人

How many books are on the shelf?

书架上有多少本书啊？

How many课堂 - SpeakingMax英语口语达人

Gold karate trophies obscured the half-dozen books on the lone shelf.

NEWYORKER: Deniers

Stanford library director Michael Keller says the librarians determined which books to keep on the shelf by looking at how frequently a book was checked out.

NPR: Stanford Ushers In The Age Of Bookless Libraries

To the right, a button lets you open the book (you can also accomplish this by simply clicking on the book, naturally), view more info on the title, delete it from your shelf or find similar books -- yet another spot for some e-book upselling.

ENGADGET: Kobo Glo review: another illuminated e-reader lights up the market