...r)，折射光线在入射面内，这条光线称为寻常光线(ordinary rays)，简称折射光线在入射面内，这条光线称为寻常光线(ordinary rays)，简称o光。另一条光线不遵守通常的折射定律，它不一定在入射面内，这条光线称为非常光线(extraordinary rays)，简称。
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ordinary ray index 寻常光折射率
extra ordinary ray 非常射线
ordinary light ray 寻常光线
ordinary x ray 常规x线
ordinary y ray 寻常光线
N the plane-polarized ray of light that obeys the laws of refraction in a doubly-refracting crystal 常光线 → compare double refraction, extraordinary ray
"The next round of talks is a ray of light of hope to the ordinary Zimbabwean," he said.
他说：“下一轮谈判对于津巴布韦平民百姓是一线希望的光芒。”
They can also radiate far infrared ray (FIR) energy of varying frequencies, which is something ordinary people can not do.
它们还可以辐射远红外线不同频率(区)的能源，这点是一般人做不到的。
DEXA scans measure the calcium content in the bones - this cannot be evaluated in an ordinary X-ray.
地塞米松扫描测量中钙含量的骨头-这可以不进行评估，在一个普通的X射线。
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