In natural materials, light waves entering at an Angle always bend to plunge more steeply into the material-the hallmark of a refractive index greater than 1.
在自然物质中，以一定角度进入的光波，进入物质后的角度更小——标志着折射率大于1。
The ports are designed to prevent liquid drops or airborne solid particles from entering the housing when introduced at any angle greater than 60 degrees downward from vertical.
该端口设计防止任何大于60角度的液体滴漏和固体颗粒进入电机。
The angle of entering water in diving was vertical or horizontal.
跳水入水角度为正常垂直入水及平拍入水。
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