have its place

Both the phone system and the post office have their uses. Although either one could be used for almost any communication, in some cases one is definitely superior to the other. The same is true of UDP and TCP. The last several chapters have all focused on TCP applications, which are more common than UDP applications. However, UDP also has its place ; in this chapter, we'll look at what you can do with UDP in Java. If you want to go further, look at Chapter 14 . Multicasting relies on UDP; a multicast socket is a fairly simple variation on a UDP socket.

 

这一段文章有很多值得记忆的用法

1.be superior to  

比xxx优越

 

2.the same is true of a and b

a和b也同样， 不要再用 a and b is the same 了

 

3.have its place

有它的位置，有它的用途

 

4.variation on

在什么方面的一个变种，文中，multicast socket也是在UDP socket上的一个相当简单的变种应用