System CPU. The amount of time, or percentage of elapsed time, a method
listed in a collected experiment spends executing within the operating system
kernel.
User CPU. The amount of time, or percentage of experiment elapsed time, a
method listed in a collected experiment spends executing outside the operating
system kernel.
这两句怎么翻译?其实我是不了解第一句的within和第二句outside代表的什么..
什么叫做within操作系统内核,和outside操作系统内核?

英语和操作系统原理都差的孩子你伤不起