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织物对声波的衰减作用具有频率选择性。
The decline effect of fabric on sound wave has the chractaristic of frequency alternative.
youdao
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一般的，信道既是频率选择性的又是时间选择性的。
Generally the channel is both frequency selective and time selective.
youdao
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一般的，信道既是频率选择性的又是时间选择性的。
Generally the channel is both frequency selective and time selective.
youdao