大家都搜：
它们是图书馆里的书
1、the library───图书馆
2、in the library───在图书馆
3、they are in the door───他们在门口
4、they are they───他们是他们
5、who they they are───他们是谁
6、are they───是吗
7、they are in love───他们相爱了
8、they are the───他们是
9、library books───图书馆藏书（librarybook的复数）
1、The computer on that desk has a database with a record of all the books in this library, and the shelves they are on.───那张桌子上的电脑有资料库，记录有这座图书馆里的所有图书，以及所放置的书架。
2、If books are not returned to the library on time or not renewed before they are due, a fine must be paid in accordance with the regulations.───如果不稳定时将书偿还藏书楼或到期前不续借，就得按划定罚款。