semantic presupposition and semantic entailment are two closely related concepts. to discriminate them will be helpful to understand and use the natural language.
语义预设和语义蕴涵是两个密切相关的概念,对二者进行鑒别,有助于準确地理解和使用自然语言。
so, we should to research the things of presupposition, semantic entailment and discriminating the approach and point out the essence on it and replenish the existential approach.