声学

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((shēng )(xué )(shēng )(xué ))

()()(xué )(de )()()()(mén )(yán )(jiū )(shēng )()(chǎn )(shēng )(chuán )()(jiē )(shōu )(zuò )(yòng )(děng )(de )(xué )()

(chén )(yuán )(shè )(huì )()(yán )(xué )》2.3:“()(fāng )(niǎo )(lèi )()(shòu )(jīng )(rǎo )()(men )(jiù )()(chū )()()(jiū )(jiū )(de )(gāo )(pín )(xiào )(shēng )(zhè )(zhǒng )(gāo )(pín )(xiào )(shēng )(shèn )(zhì )(zài )(shēng )(xué )(shàng )(dōu )()(róng )()()(dìng )。”

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