名词
中文翻译：初级雷达同义词
同义词：
['primary radar system', 'primary radar equipment']
例句：
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1. The primary radar system is used to detect and track enemy aircraft in the airspace.
初级雷达系统用于在空中域探测和跟踪敌机。
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2. The primary radar equipment was designed to provide real-time data for tracking targets.
初级雷达设备设计为提供实时数据，以追踪目标。
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3. In the early days of radar technology, primary radar systems were used to monitor enemy movements.
在雷达技术初期，初级雷达系统被用来监测敌军动向。