semantic features的用法和样例：
例句
- It is essential to grasp the semantic features of the prefixes in the study and practice of English.
精确地把握否定前缀的语义特征是学习和应用的关键。 - This paper analyzes its semantic feature and various discourse functions such as cohesion, economy, objectivity, formality, and vividness.
本文分析其语义特征和语篇衔接，简洁，客观，正式及生动等功能。
