pre按键突起而圆润，近似球面。数字和shift键通过漂亮的橙色于其它按键形成对比。
The keys appear to be slightly raised and rounded, almost bulbous, and have nicely contrasting orange labels on the numeric keys and the shift button.
本文给出了二级近似时近轴球面反射成像的物象规律，进而讨论了横向放大率与像差。
The more exact object image law of reflection image on axial spherical surface is presented, the lateral magnification and aberration are discussed.
为了改善光纤激光器的输出光束特性，将光纤端面加工处理成近似凸球面。
In order to improve the beam properties of fiber lasers, the fiber-end surface is processed similar to a convex spherical surface.
最后提出了当三轴椭球面接近于球面时其面积的一个相当准确的近似表达式。
Finally, a rather precise, approximate formula for the area of the 3 axes ellipsoid when it tends to sphere is proposed.
最后提出了当三轴椭球面接近于球面时其面积的一个相当准确的近似表达式。
Finally, a rather precise, approximate formula for the area of the 3 axes ellipsoid when it tends to sphere is proposed.
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