If you imagine yourself tossing a ball in the air in front of a mirror, P symmetry seems intuitively obvious.
想像如果你在镜子前面丢球，P对称看来是无庸置疑的。
The mirror ball no doubt heaved a sigh of relief as it regained its status as the high diva of disco fever.
那个玻璃球现在肯定是松了一口气，因为它又可以重新主宰迪斯科舞场了。
The treatment nasal cavity paranasal sinus fungus ball the mirror paranasal sinus surgery eliminates in Dou after the nose in the fungus block is the most effective treatment method thoroughly.
治疗鼻腔鼻窦真菌球经鼻内镜鼻窦手术彻底清除窦内真菌块是最有效的治疗手段。
Concentric machined and mirror-polished ball.
同心加工和镜面抛光球。
Concentric machined and mirror-polished ball.
同心加工和镜面抛光球。
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