Shūjià / shàng / de / shū / shǔ / bu / jìn / ， / wǒ / bù / zhīdào / gāi / xiān / dú / nǎ / yì / běn / 。

书架上的书数不尽，我不知道该先读哪一本。

There are too many books on the shelf to count, and I do not know which one to read first.