The VFS provides the abstraction layer, separating the POSIX API from the details of how a particular file system implements that behavior.

VFS 提供抽象层，从而将 POSIX API 与特定文件系统如何实现该行为的细节分离开来。

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The context object we saw earlier is an example of a uniform POSIX like abstraction around the microkernel called the NetKernel Foundation API.

之前我们了解的上下文对象context就是一个统一的POSIX的例子，就像是被称作NetKernel基础API的微核的抽象。

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