中文摘要：

与一般的语词和语句不同,索引词有特殊的内涵和外延,含有索引词之句子的真假与特定的语境相关;在一门语言中,索引词既不能被完全取代、也不能被全部消除。从逻辑哲学的角度研究索引词,不仅可以丰富传统的意义理论和指称理论,拓宽语言逻辑的研究范围,而且有助于解决语用悖论。

英文摘要：

Indexicality defers from ordinary words in two sides, its intention and extension. The truth value of a sentence containing an indexi- cality is determined by certain context to some extent. In a language, indexicalities can＇t be replaced completely, nor can it be eliminated from all sides. Studying indexicalities in the view of Philosophy of Logic will enrich traditional theories of meaning and reference, broaden the scope of logic of language, and help us in solving the pragmatic paradoxes.