这些信息的集合构成了段描述符。
在保护模式下，哪个寄存器引用栈段描述符。
In protected mode, which register references the descriptor for the stack segment?
要使用给定的段描述符，它的值需载入段寄存器中。
To use a given segment descriptor, its value is loaded into one of the segment registers.
段描述符提供了段基址、访问权限、类型和使用信息。
A segment descriptor provides the base address of a segment and access rights, type, and usage information.
引用一个不在内存中的段(段描述符的段存在标志为空)。
A reference was made to a segment not present in memory (one in which the Segment-Present flag of the segment Descriptor was cleared).
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。
Other than segment descriptor numbers, the contents of these registers are inaccessible to all software.
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。
In order to update a segment register, the corresponding segment descriptor must be modified in kernel memory and then reloaded into the segment register.
每次将段选择器加载到段寄存器中时，对应的段描述符都会从内存加载到相匹配的不可编程CPU寄存器中。
Each time a segment selector is loaded on to segment registers, the corresponding segment descriptor is loaded from memory into a matching non-programmable CPU register.
shm_unlink()：根据（shm_open()返回的）文件描述符，删除共享内存段。
shm_unlink(): Deletes a shared memory region given a file descriptor (returned from shm_open()).
在等待一段时间之后，重新开始，重复读取每个文件描述符。
After you wait for some amount of time, you start over again by repeatedly reading each file descriptor.
这个描述符指明了包含中断或异常处理函数的段的基地址。
This descriptor specifies the base address of the segment that includes the interrupt or exception handler.
描述符系统获得的三维点段，施加数值来表示形状的形状，颜色和密度的拍摄图像。
A descriptor system obtains the 3d points to segment, applying numerical values to the captured images that represent the shape, color and density of the shapes.
描述符系统获得的三维点段，施加数值来表示形状的形状，颜色和密度的拍摄图像。
A descriptor system obtains the 3d points to segment, applying numerical values to the captured images that represent the shape, color and density of the shapes.
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