"A moonbow is just like a rainbow but is caused by the moon reflecting off rain mist at a certain Angle," says Pacholka.
一道月虹就像一道彩虹，它是由月光在湿度大的薄雾中经过一定角度反射形成的。
Angle of Incidence the Angle between an incident ray and the normal to a reflecting or refracting surface.
入射角度入射光与照射在反射或折射平面上的正常光线之间的角度。
Sampling distributions of mean direction and resultant length were used to develop control charts respectively reflecting the central tendencies and positions of the Angle process.
基于平均方向和合向量长度的抽样分布，研究反映角度过程集中程度的合向量长度控制图和反映角度过程集中位置的平均方向控制图。
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