永存

perpetuation

1. 顶极群落，演替顶极生态发展的一个阶段，在此阶段一群有机体（尤指植物）能保持自身的稳定及永存
   A stage in ecological development in which a community of organisms, especially plants, is stable and capable of perpetuating itself.

永的英语翻译：

存的英语翻译：