semantic features的用法和樣例：
例句
- It is essential to grasp the semantic features of the prefixes in the study and practice of English.
精確地把握否定前綴的語義特徵是學習和應用的關鍵。 - This paper analyzes its semantic feature and various discourse functions such as cohesion, economy, objectivity, formality, and vividness.
本文分析其語義特徵和語篇銜接，簡潔，客觀，正式及生動等功能。
