functional linguistics的用法和樣例：
例句
- The discourse analysis is the characteristic of the systemic linguistics.
語篇分析是系統功能語言學有別於其它語言學流派的重要特徵。 - He has conducted research and published in the fields of Sociolinguistics, Functional Linguistics, Applied Linguistics and English Language Teaching.
研究領域涉及社會語言學，功能語言學，應用語言學，英語語言教學。
