frequencies
['frɪkwənsɪz]
n.
（某事发生可重复的）频率( frequency的名词复数 );
发生率;
（声波或无线电波的）振动频率;
经常发生;
例句:
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The distorted bass frequencies and gritty trebly loops do that.
来自BBC
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Because these frequencies are interfering with omnipresent CMBR noise.
来自SA
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For an initial service, a 10 megahertz-wide band of frequencies will be needed.
初始服务需要10兆赫宽的频带。
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If the frequencies are low, this approach cannot be used.
若频率很低时, 这种方法就不能使用.
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We are asking a network or system to attenuate certain frequencies.
我们正在要求一个网络或系统去压制某些频率.
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He's been noted for his use of low frequencies.
来自BBC