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The optical properties of circular polarization filters made of cholesteric liquid crystal thin films are investigated.

研究了胆甾相液晶薄膜滤光器的光学性质，给出了这种薄膜的制作技术。

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There is no way that you could irradiate a crystal of nickel with a single beam of x-rays and get that circular ring pattern if the electron beam were behaving as a particle beam only.

没有什么其他的途径,可以让镍晶体发射,单束X光来,继而得到环状图案,如果电子束,是以粒子束形式出现的。

麻省理工公开课 - 固态化学导论课程节选

In the master bedroom, a leather-upholstered headboard serves as the backdrop to a bleached fox-fur bedspread and a circular crystal chandelier hangs overhead.

WSJ: The Art of Designing Luxury Model Apartments

Its stainless steel cover protects the internal gears, which have the same coating as high-performance racing engines, and features a circular display with a 62-carat sapphire crystal lens.

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