The perfect crystalline quality of PS films is verified by X-ray diffraction (XRD) and Raman spectroscopy.

x光衍射分析表明样品具有良好的晶体质量；

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Not only do Firaxis have quite a strategy pedigree of their own, they were also founded by former employees of Microprose, publishers of the original X-COM (which, PS, is the best PC game ever made: just putting that out there).

FORBES: Fly-Past Friday: New X-COM: Enemy Unknown Video