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轴性、光性：一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的，其黑十字臂未达中心，形成中空的图案，俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。12He attempted again in various other cities and succeeded with Crystal Caramels.他又在其他几个城市再次尝试，并
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It may be inferred that the emissions at 554 nm and 658 nm undoubtedly are a two-photon system by the connection involving pump power and up-conversion luminescence intensity, and also the achievable up-conversion emission mechanism has actually been explored. In the meantime, the luminescence life of eco-friendly and crimson light-weight decreases