The barcoded book is stored in a tray, which also contains a barcode and the trays are placed on the shelves, which are again barcoded.

有条形码的书籍存放在托盘，托盘也包含条形码，放置在搁架上，再编条形码。

youdao

Soon I was sitting comfortably with a tray full of food before me and a book at my side.

不久我就舒服地坐下，前面有一盘丰盛的食品，旁边有一本书。

youdao

Book spines can also provide unexpected pattern, as can pictures and even bottles on a drinks tray.

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