permanent existence

• 持续生存

permanent existence的用法和样例：

例句

1. The acceptance and satisfaction of customers make the only way for NCO's persistent existence and development.
   客户的认可和满意是九方持续生存和发展之唯一途径。
2. We obtain some conditions under which the dispersal system is permanent or extinction.
   得到了此扩散系统永久持续生存及灭绝的条件。