Time Average of Bilinears. Energy Flow in Plane Waves. Circular and Elliptic Polarization. Phase and Group Velocities. Dispersion.是什么意思_Time Average of Bilinears. Energy Flow in Plane Waves. Circular and Elliptic Polarization. Phase and Group Velocities. Dispersion.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句