预先非有不可的 meaning in English

prerequisite

There are several additional prerequisite skills as defined in the red hat exam prep guide
有如红帽考试预科的指南所定义的一些另外的预先非有不可的技术。
That is the only way to see if you have the prerequisite skills necessary for the remaining chapters
如果你为剩馀的章节让预先非有不可的技术必需，那是见到的唯一方法。
This chapter covers the prerequisite topics for red hat ' s rh300 course in a minimum of detail , with references to other books and sources for more information
这一个章节为至少明细的红帽rh300课程复盖预先非有不可的主题,关于其他的书和来源为较多的信息。