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。
2
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。
3
The angle of entering water in diving was vertical or horizontal.