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短语

infrasound

['ɪnfrəsaʊnd] 名词
卫生保健 infra-son; infrason m
物理科学 infra-sons
infrasound Vibrations of the air at frequencies too low to be perceived as sound by the human ear, below about 15 hertz ['ɪnfrəsaʊnd] 名词
环境 infrason m
 英语 词库
infrasound ['ɪnfrəsaʊnd] 名词
军队 Very low-frequency sound which can travel long distances and easily penetrate most buildings and vehicles
infrasound
: 1 短语, 1 学科
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