它是利用多相介质具有不同的介电常数，通过电容传感器测量获得介电常数分布而获得介质分布的图像。
By using multiphase medium with different permittivity, the image of medium distribution could be obtained through measuring the obtained permittivity by capacitance sensor.
第 二介质层（4）的介电常数大于第一介质层（14）的介电常数。
The dielectric constant of the second dielectric layer (4) is greater than the dielectric constant of the first dielectric layer (14).
分别介绍了低介电常数、中介电常数、高介电常数三类微波介质陶瓷的研究现状，并探讨了微波介质陶瓷今后的发展趋势。
The hypo-dielectric constant, middle-dielectric constant and hyper-dielectric constant, as well as their developing trend are also introduced.
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