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。

youdao

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。

youdao

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.

该应用程序中使用的 XSLT 中介对 前面的文章中提供的中介（在消息的副本上执行 XSLT）稍微进行了一些改进。

youdao

When one of the registrars sends an addition, deletion or modification to a DNS record, SnapNames receives a copy of that change and maintains its own comprehensive database of domain name registrations called Whois.

CNN: New service back-orders domain names