这套百科全书有三卷。

The encyclopedia is available in three ___volumes.

这部小说系列共有五卷，每卷探索一个不同角色的故事。

The novel series consists of five ___volumes, each exploring a different character's story.

她将全套历史卷册捐赠给了图书馆。

She donated the complete set of historical ___volumes to the library.