名词
中文翻译：天线有效高度
同义词：
['effective antenna height', 'antenna gain', 'antenna efficiency']
例句：
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1. The antenna is designed to operate at an effective height of 30 meters.
该天线设计为在30米的有效高度上工作。
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2.The antenna's effective height is crucial for its performance.
天线的有效高度对其性能至关重要。
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3. The antenna was adjusted to achieve the desired effective height.
天线被调整以获得所需的有效高度。