这是因为外观对功能有很大的影响：如果一个应用程序看起来很混乱或不合逻辑的话，也必然是很难理解和使用的。

This is because appearance has a strong impact on functionality: an application that appears cluttered or illogical is hard to understand and use.

youdao

例如，在给朋友写信的时候，你可能会使用小写字母，俚语或缩写，甚至有时候单词拼写错误，语法混乱，不过这都没有关系，因为你们的关系亲近，理解对方。

For example, you may write in all lowercase letters, use slang and abbreviations, and perhaps even let misspellings and bad grammar go by, when sending email to your friends.

youdao

例如，在给朋友写信的时候，你可能会使用小写字母，俚语或缩写，甚至有时候单词拼写错误，语法混乱，不过这都没有关系，因为你们的关系亲近，理解对方。

For example, you may write in all lowercase letters, use slang and abbreviations, and perhaps even let misspellings and bad grammar go by, when sending email to your friends.

youdao