permanency

n.

恒久的人[物、地位]，永存；

复数：permanencies

1. There's no permanency about those little distinctions.
   那些小小的头衔并不能保持永久。
2. Of course permanency has been a problem for artists since the first prehistory artist scratched into a chalk wall in a French cave.
   当然，对艺术家来说，保存永久的艺术形式是一个问题，比如说，史前艺术家以前在山洞的石灰墙上创造作品，但现在不会有人这么做了。

Permanency of response to selection for quantitative characters in finite populations
Special Report: Permanency Planning for Children in Kinship Foster Homes.
From child abuse to permanency planning : child welfare services pathways and placements
Permanency in kinship care: an exploration of disruption rates and factors associated with placement disruption
Kinship care for the safety, permanency, and well-being of children removed from the home for maltreatment
Kinship care for the safety, permanency, and well‐being of children removed from the home for maltreatment
The Late Cretaceous lizard Pleurodontagama and the origin of tooth permanency in Lepidosauria
Clinical application of attachment theory in permanency planning for children in foster care: The importance of continuity of care
Pathways from Traumatic Child Victimization to Delinquency: Implications for Juvenile and Permanency Court Proceedings and Decisions
A comparative analysis of the adaptive developmental hypothesis in six Mediterranean anuran species along a pond permanency gradient