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Contents ·No. 1 ·No. 2 ·No. 3 ·No. 4 ·No. 5 ·No. 6 ·百科辞典 ·English Expression ·Thesaurus ·Related Phrases ·Containing Phrases ·More results... No. 1 　　A substance within a substance found in the other, the latter is the former media; some of the wave movement (such as sound, light, etc.) to spread the material is called the wave movement of media. Also called the media. Translated by Google No. 2 　　◎ media jièzhì Translated by Google No. 3 　　A substance present in another substance, the latter is the former media Translated by Google No. 4 　　Some wave movement (such as sound, light, wave, etc.) to spread the material Translated by Google No. 5 　　Of Physics. A substance within a substance found in the other, the latter is the former media; some of the wave movement (such as sound, light, etc.) to spread the material is called the wave movement of media. Translated by Google No. 6 　　声的传播需要物质，物理学中把这样的物质叫做声的介质。 　　光的传播不需要物质。 　　一种物质存在于另一种物质内部时，后者就是前者的介质；某些波状运动（如声波、光波等）借以传播的物质叫做这些波状运动的介质。也叫媒质。 　　例如：光通过镜片，镜片就是介质；光进入水里，水就是介质。 　　介质主要分为:空气，液体，固体。 　　声的传播速度：气体中<液体中<固体中， 　　常温（15°）下，一些固体中的声速约为5200米每秒，液体中的声速约为1500米每秒，空气中的声速约为340米每秒。 百科辞典 　　介质 　　　　即"递质"。 　　　　 English Expression :  mediator n.:  agency,  agent,  medium,  media Thesaurus agent, agent, actor, force or substance that produces an effect or change Related Phrases sound amplify physics phenomenon amplify transmit organism English magnetic tape handler brain network cabling physics Acoustics Wikipedia Daquan phrase language physics electrochemistry phoenix effect liquid notion chemistry music disc piracy More results... Containing Phrases dielectric