intuitive：直观的

We give only a high-level, intuitive discussion of queuing delay here

我们在这里只给出排队延迟的高层次，直观的讨论

extent：程度

the traffic intensity often plays an important role in estimating the extent of the queuing delay

交通强度通常在估计排队延迟的程度中起重要作用

negligible：可以忽略不计的

Let’s also suppose for the moment that the network is uncon- gested (so that queuing delays are negligible)

让我们还假设网络不拥塞的时刻（因此排队延迟可以忽略不计）

notion：概念

These illusions are provided by the notion of a process, one of the most important and successful ideas in computer science.

这些错觉是由过程这个概念提供的，这是计算机科学中最重要和最成功的想法之一。

interleave：插入

The operating system performs this interleaving with a mechanism known as context switching.

操作系统使用上下文切换机制实现这种插入。

somewhat：有点

The notion of a shared library is a powerful but somewhat difficult concept.

共享库的概念是一个功能强大，但有些难以理解的概念。