... 频率补偿发生器 frequency offset generator 频率原点 frequency origin 频率故障报告 frequency outage report ...
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The WDCS says the frequency ranges of some noise sources of human origin may be blotting out other, biologically important sounds, preventing mothers and calves from staying in touch and masking sound cues for predators and their prey.
BBC: NEWS | Science/Nature | The deafening sound of the seas
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