StringBuilder; one is immutable and changes to it cause the creation of a new copy, the other allows for in-place modification.
一个是不可变的，当需要修改的时候它会创建一个新的副本，而另一个则允许直接在其上进行修改。
2
You may notice that the creation of this test required only a simple copy and modification of the previous test.
您可能注意到，创建的此测试只是简单地复制并修改了一下先前的测试。
3
The XSLT mediation used by this application is a slight modification to the mediation provided in the previous article, which performed the XSLT on a copy of the message.