“延异”(différance)是解构理论的一种重要术语,由解构主义大师德里达发明。不过德里达并没有为“延异”下一个明确的定义,甚至一再强调“延异”“不是一个词,也不是一个概念”。本文从不同侧面探讨“延异”的内在意蕴与外在延续构成的张力。首先梳理德里达对“延异”的创造和阐释,接着追溯了“延异”的思想来源,论述“延异”与时空、“延异”与差异的内在联系,最后对“延异”与“播撒”、“踪迹”、“替补”等概念的关系做了比较。 “Différance ” (différance) is an important term of deconstruction theory, invented by deconstruction master Derrida. However, Derrida did not make a clear definition of “variation” and even repeatedly stressed that “variation” is not a word nor is it a concept. “ This article explores the tensions formed by the inherent implication and external continuation of ”Difference “ from different aspects. First of all, Derrida combs the creation and interpretation of ”Difference “, then traced the source of ”Difference “, discusses the inner relationship between ”Difference “ and space-time, ”Difference “ and difference Finally, the author makes a comparison between the concepts of ”Difference“ and ”Sowing“, ”Trace“, ”Substitute" and so on.