“不即不離”與“不粘（黏）不脱”夙被作爲中國詩學乃至古典美學的一般命題來討論，但實際上它們主要與詠物詩的理論反思相聯繫，且集中於清代乾隆年間，是由性靈詩學引發的焦點話題之一。它們與性靈詩學的重要概念“切”相表裏，在特定的詩學語境中獲得很大程度的理論充實和深化。

The two prosodic doctrines, “not attaching but not detaching＂ and “not approaching but not departing,＂ have long been treated as a general poetic theory in Chinese poetics as well as classical Chinese aesthetics. However, they are actually related to the reflection on the theory on the genre of poetry on objects (yongwu shi), a trend prevalent mainly in the Qianlong reign-period (1736-1796) of the Qing Dynasty. These two doctrines were inspired by the poetics on “inner nature and soul＂ and have a close relationship with the concept of “strikingly relevant＂ (qie). They were largely enriched and deepened in the specific poetic context of the time.