这一节将只讨论介质分层媒质.Only dielectric stratified media will be treated in this section.光波在激活媒质中来回穿过时,将不断得到加强.The wave continues to grow as It'sweeps back and forth across the active medium.麦克斯韦电磁场方程描写了媒质的这种可测量的扰动,而不去详细讨论以太本...
他有一双清澈的蓝眼睛和一脸灿烂的微笑。He has clear blue eyes and a dazzling smile.他脸上绽放出灿烂的笑容。His face broke into a wide grin.员工的脸上都带着灿烂的笑容。The staff wear big sunny smiles....