详细的文字开始，化学和本集团的分类和正在进行的研究讨论的问题，如颜色，结构和光学异常晶体的解释。
The detailed text begins with an explanation of the chemistry and taxonomy of the group and a discussion of ongoing research into problems such as color, structure, and optically anomalous crystals.
增强红外吸收与异常红外效应是其特殊的红外光学性能。
The enhanced ir absorption and abnormal ir effects are their anomalous ir optical properties.
用光学显微镜、透射电子显微镜以及电子探针等现代材料试验手段对50钢中存在的大块黑色团状异常组织进行了研究和分析。
The abnormal block and black round structure of 50 axletree steel was studied and analyzed using optical microscopy, transmission electron microscopy, electron probe and so on.
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