As I have suggested, the analysis of language in a text is just one aspect of its use.

正如我所说，对文本中语言的分析只是其使用的一个方面。

Applied linguistics contributes to the field of forensic linguistics, which involves the analysis of language in legal contexts, such as courtroom discourse, authorship attribution, and language evidence.

应用语言学对法庭语言学领域做出了贡献，该领域涉及法律背景下的语言分析，例如法庭话语、作者归属和语言证据。

Theoretical Linguistics is the analysis of language structure focusing on analysis of the sound patterns of language (phonology), the structure of words (morphology), the structure of sentences (syntax), and the interpretation of words and sentences(semantics).

理论语言学是对语言结构的分析，重点分析语言的声音模式（音系学）、词语结构（形态学）、句子结构（句法）以及词语和句子的解释（语义学）。