gyrotropic bi-refringence旋转: revolve; gyrate; rotate; spi ...变: become different; change折射: refringence; refingency; ana ...缓变折射率: graded-index渐变折射率: gi(grated index下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:旋转变折射,即可在微信中查询翻译