Perhaps surprisingly, the distinction between a language and a dialect usually has nothing to do with pronunciation, vocabulary, or any other linguistic features.

也许令人惊讶的是，一种语言和一种方言之间的区别通常与发音、词汇或任何其他语言学特征没有关系。

For example, a personal letter, even though it is written, will contain linguistic features marking interactivity because the writer of a letter wishes to interact with the receiver of the letter.

例如，一封私人信件，即使是书面的，也将包含标记交互性的语言特征，因为信件的作者希望与信件的接收者进行交互。

Some corpora attempt to cover the language as a whole, tak-ing extracts from many kinds of text; others are extremely selective, providing a collec-tion of material that deals only with a particular linguistic feature.

有的语言库把各种文字整理出来，试图覆盖语言的全部；而其他的语言库则非常有针 对性，只提供具有某些语言学特点的材料。