在或高或低的层次上，内核被划分为多个子系统。

At a high level, and at lower levels, the kernel is layered into a number of distinct subsystems.

youdao

在或高或低的层次上，内核被划分为多个子系统。

At a high level, and at lower levels, the kernel is layered into a number of distinct subsystems.

youdao