例如，许多操作系统以几十毫秒作为时间度量的单位。

For example, many operating systems measure time in units of tens of milliseconds.

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传输操作时刻表由基循环组成的系统矩阵为基础，时间间隔尺度以网络时间单元为单位实现时间同步。

On the basis of communication operation schedule for system matrix formed with basis cycle, the time synchronization of system was obtained depending on the net time unit (NTU).

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注意，当返回值的时间单位是毫秒时，值的粒度取决于基础操作系统，并且粒度可能更大。

Note that while the unit of time of the return value is a millisecond, the granularity of the value depends on the underlying operating system and may be larger.

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