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.
基于米(长度)、克(重量)、秒(时间)和安培(电流)的一种测量单位公制系统。
A metric system of measurement units based upon the meter (length), gram (weight), second (time) and amperes (electrical current).
实际操作层是交通管控系统的核心，它能以秒，或更小的单位控制交通。
The operational layer is at the very body of the traffic management and control system and it controls the traffic exactly down to a one second resolution or even more exactly.
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