诸如MS - DOS之类的操作系统可以加载其他设备驱动程序，例如CD - ROM驱动器，但是需要所有硬件驱动程序在启动时就已经加载上来了。
An operating system such as MS-DOS can load additional device drivers, such as CD-ROM drivers, but needs all of the hardware drivers already loaded at startup.
诸如MS - DOS之类的操作系统可以加载其他设备驱动程序，例如CD - ROM驱动器，但是需要所有硬件驱动程序在启动时就已经加载上来了。
An operating system such as MS-DOS can load additional device drivers, such as CD-ROM drivers, but needs all of the hardware drivers already loaded at startup.
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