频率低于人类可听范围的。
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频率低于人类可听范围的。；产生或使用此类声波的。；亚声的；次声的；低于声频的；[医] 听域下的
Having frequencies below the human audible range
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频率低于人类可听范围的。
Having frequencies below the human audible range
产生或使用此类声波的。
Generating or employing such sound waves
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Dictionary facts from ECDICT, WIKTIONARY.