atemporal

adj.

1. 非时间的；不受时间影响的
   existing or considered without relation to time

1. During early pregnancy, the endometrial cells can form atemporal permeability barrier around the embryo to protect it from the maternal harmfulenvironment.
   在妊娠早期过程中，为了保护胚胎免受母体不利环境的侵害，子宫内膜细胞在胚胎的周围形成了一个短暂的渗透屏障。
2. Analytic Methods for Linear Atemporal System
   浅析线形非时变系统的分析方法