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负折射率媒质是一种人造媒质，在某一微波波段内其介电常数和磁导率同时为负值。
Negative refractive index materials are artificial materials with permittivity and permeability both negative within certain microwave frequency band.
负折射率媒质是一种人造媒质，在某一微波波段内其介电常数和磁导率同时为负值。
Negative Refractive Index Materials (NRIM) is a kind of substance with negative permittivity and permeability simultaneously.
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