In order to update a segment register, the corresponding segmentdescriptor must be modified in kernel memory and then reloaded into the segment register.
更新段寄存器时，与其相应的段描述符必须在核心内存中修改，然后重新载入段寄存器。
2
Other than segmentdescriptor numbers, the contents of these registers are inaccessible to all software.
除了段描述符的号码以外，这些寄存器的内容对所有软件来说都是不可访问的。
3
Together this information forms a segmentdescriptor.