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汉语拼音：guāng dù

天文学上指天体的发光能力。由亮到暗可把恒星分为7级，即超巨星、亮巨星、巨星、亚巨星、矮星、亚矮星、白矮星。

1. 光明吉庆的征兆。

   《文选·班固＜典引＞》：“有不俾而假素，罔光度而遗章。” 李善 注：“未有告之以光明之度，而遗其篇章。” 张铣 注：“无大庆之瑞亦妄遗跡於旧传。”

2. 亮度。

   洪深 《戏剧导演的初步知识》下篇四：“譬如图画所绘录的景象中，色彩则有浓有淡，光度则有明有暗。”

3. 光源所发的光的强度，通常以烛光为计算单位。

4. 光洁度的简称。

• The purchase of a spectrophotometer is obviously dependent on the kind of specimens which are to be analyzed.

  购买何种类型的分光光度计，主要取决于被测样品的性质。

• Indirect photometric detection in CE is often employed for detection of compounds that lack of suitable chromophores.

  间接光度检测通常是用来检测并行工程的化合物，缺乏合适的发色团。

• Conclusion: The preparation process is stable and the hemolysis test is accurate and easy to be observed.

  结论：筛选的制备工艺稳定，紫外分光光度法测定溶血度快速准确。

• However, the irradiance did not correlate with the age of the incubator.

  相对地，光度与保温箱机龄之间并不具有相关性。

• Paradoxical as it may seem, the value of a star's luminosity does not depend on the nuclear reactions taking place in the interior.

  看来十分奇怪的是，恒星的光度竟然与发生在内部的核反应无关。

• Spectrophotometer and Laser Roman Spectrometer have been used for determining the intensity of transmission and emission.

  用分光光度计和激光拉曼光谱仪分别测定了样品的可见光透过率和发光强度。

• The new source has hardly changed in brightness over the course of a year, and its spectrum is steady.

  相比之下，最新发现的奇特喷射射电在一年时间内光度几乎不会变化，并且光谱也稳定不变。

• ALUMINIUM OXIDE PRIMARILY USED FOR THE PRODUCTION OF ALUMINIUM. DETERMINATION OF SODIUM. FLAME SPECTROPHOTOMETRIC METHOD (EMISSION).

  主要用于铝生产的氧化铝.钠的测定.火焰分光光度法（发射）

• The thin layer chromatography-spectrophotometry analysis was used to investigate the total content of triterpene saponins in Melia plants.

  采用薄层色谱分离-分光光度法测定楝科植物中总三萜皂苷含量。