This system can be divided into two sub-systems: gear CAD system, gear CAPP system.

该系统分为两个子系统：齿轮CAD系统、齿轮CAPP系统。

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The two sub-systems are air data system (ADS) and tactical air navigation system (TACAN).

以塔康系统为例对特定频段导航系统信号进行了分析和模拟。

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Firstly, the state variables of the reentry vehicle are decomposed into two sub-systems of different time scales using the singular perturbation theory.

首先，利用奇异摄动理论对再入飞行器状态变量进行两个时间尺度的划分，将系统状态方程分解成两个低维子系统。

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The National Weather Service had earlier said the combination of two weather systems from the polar and sub-tropical jet streams would produce a "potentially historic" storm.

BBC: Snowstorm batters north-east US and Atlantic Canada