main partition meaning in English

主隔壁
主划分, 主分区

After you have selected the desired parameters for your encrypted partitions , return back to the main partitioning menu
当您选择好加密分区参数之后，返回分区主菜单。
To use encryption , you have to create a new partition by selecting some free space in the main partitioning menu
为了使用加密，您必须在主分区菜单选择空闲的空间创建一个新分区。
After returning to the main partitioning menu , you will see all encrypted volumes as additional partitions which can be configured in the same way as ordinary partitions
返回主分区菜单后，您将看到所有的加密卷作为额外的分区，它们可以像其他的普通分区一样配置。