While drive letters split the file system into a series of different trees (one for each drive), Linux always has a single tree.

相比于使用盘符的文件系统，盘符将文件系统划分成一系列不同的树(一个盘符代表一个文件目录树)，而Linux系统只有一个文件目录树(并没有分割文件系统)。

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The host OS and the disk drive operating system can be run on a single processor.

主机操作系统可作为盘驱动器操作系统下的任务运行。

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The main drive system of stretch reducer is made with differential and single driving system.

张力减径机的主传动系统是由集中差速传动系统和单独传动系统组成的混合传动系统。

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And unlike dual-drive designs, WD's hybrid technology provides single-unit design homogeneity that OEM system manufacturers have long sought from the storage industry.

ENGADGET: Western Digital builds 5mm-thick hybrid hard drive, Ultrabook makers sign on early