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对流层波导电波传播
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对流层波导电波传播
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工学
对流层电波传播
释
radio wave propagation in tropospheric radio duct
对流层波导电波传播
在某些气象条件下,对流层中可以形成具有一定强度和厚度的准水平大尺度层结,频率足够高的无线电波在适当的发射方向上,可在相当大的程度上进入其内,并如同在波导管中一样以异常低的衰减进行传播的现象。
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Species 2000
species-abundance distribution
species abundance distribution pattern
species analysis
species analyzed atomic fluorescence spectrometer
species-analyzed atomic fluorescence spectrometer
species-area relationship
species cataloging
species coexistence
species coexistence theory
species composition of plant community
species differences in drug reaction
species distribution model
species distribution models
species diversity
species diversity effects of pollutants
species diversity index
species diversity pattern
species diversity pattern along the elevational gradient
species diversity pattern along the latitude gradient
species evenness
species extinction
species hybridization
species identification
species indeterminata
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