名词
中文翻译：调频频率计
同义词：
['heterodyne radiometer', 'heterodynereceiver']
例句：
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1. The heterodyne frequency meter was usedto measure the frequency of the microwaves.
调频频率计被用来测量微波的频率。
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2.The heterodyne frequency meterwas used to detect the presence of aforeign object in the air.
调频频率计被用来检测空气中是否存在外来物体。
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3. Theheterodyne frequency meter wasused to measure the temperature of the liquid.
调频频率计被用来测量液体的温度。