Below the file system layer is the buffer cache, which provides a common set of functions to the file system layer (independent of any particular file system).
文件系统层之下是缓冲区缓存，它为文件系统层提供了一个通用函数集(与具体文件系统无关)。
2
Web services are sellable functions that can be accessed independent of platforms and programming languages.
Web服务是适于销售的函数，可以使用任何平台和任何编程语言访问它们。
3
These four functions are not independent of each other.