名词
中文翻译：频率选择性系统
同义词：
['frequency-selective filter', 'frequency-selective amplifier']
例句：
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1. The frequencyselective system is designed to eliminate interference from external sources.
这个频率选择性系统被设计用来消除外部干扰。
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2. The frequency selective system is used in radar systems to improve signal reception.
频率选择性系统用于雷达系统中，以提高信号接收能力。
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3. The frequency selective system is crucial for maintaining the integrity of communication signals.
频率选择性系统对于保持通信信号的完整性至关重要。