名词短语
中文翻译：相位
同义词：
['Phase-Frequency Characteristics', 'Phase-Frequency Relationship', 'Phase-Frequency Behavior']
例句：
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1. The phase-frequency characteristics of the system are crucial for its performance.
系统的性能与其相位-频率特性密切相关。
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2. The phase-frequency characteristics of the circuit were measured using a network analyzer.
使用网络分析仪测量了电路的相位-频率特性。
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3. The phase-frequency characteristics of the system were studied to optimize its performance.
研究系统的相位-频率特性以优化其性能。