设是一生灭过程，则当时，的翻译：Is life and death process established, at that time, 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Let be a birth-death process, when time,

Is life and death process established, at that time,

Supposes is a birth-death process, then at that time,

It is located, is a lifetime where and when they fight process.

Is life and death process established, at that time,