But often it's useful to store a block of related variables together.

但通常将一组相关变量存储在一起很有用。

With a File System scheme like this, the Directory File needs to store not just one block per file, but rather a list of blocks per file.

使用这样的文件系统方案，目录文件不仅需要为每个文件存储一个块，还需要为每个文件存储一个块列表。