以下为句子列表：
英文: Abstract: By means of RDS detection system, slight difference of reflectance coefficients for samples can be measured in two mutually vertical directions on the plane of the sample under approximately perpendicular incident condition, this is known as in-
中文: 文摘:利用RDS测试系统，可以在近垂直入射条件下，测量出样品的反射系数在样品平面内两个互相垂直的方向上的细微差异，即所谓平面内光学各向异性。
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英文: Although maria are recognized by their dark color, certain areas of the highlands appear to be intermediate in reflectance and contain relatively high amounts of iron.
中文: 尽管我们可以由深色阴影辨识出月海，不过高地的某些区域，似乎只有中等的反射系数，且含有相当多的铁。
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英文: At present, the infrared transmission spectroscopy is the best technique for determining whether jadeite is polymer-impregnated or not, and the infrared reflectance spectroscopy is a nondestructive and rapid determination method that provides mainly the f
中文: 摘要红外透过光谱技术是当前鉴别翡翠是否有聚合物充填的最好方法，而红外反射光谱技术是一种快速、无损伤的测试方法，主要提供矿物的基频振动光谱信息，在宝石学研究方面特别是鉴定宝石种属方面显示出新的应用可能性。
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英文: But reflected type may not reflect the true reflectance of subject surfaces like incident type meters .
中文: 但反射式就不能像入射式如实反映各主体表面的反射比率。
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英文: Calibration: Only 100% calibration is need while in transmittance mode, And record the original reflectance from the test chip when using the reflectance mode.
中文: 标定：在透射时只进行100%标定，反射时是对比较片的反射比值标定。
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