例如，某个应用程序允许将字典中的单词与其定义一起保存。
For example, consider an application that lets you maintain dictionary words with their definitions.
可以用一个单词处理应用程序对电子文档进行同样的处理。
You can use a word processing application to perform similar actions to electronic documents.
这个定义让您可以在不同的应用程序中使用距离的概念；在这里，您感兴趣的是两个字符串或两个单词之间的距离。
This definition allows you to use the concept of distance in different applications; here you're interested in the distance between two character strings, or words.
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