Reference Stars: Star with known position and/or magnitude, that are used to find the plate constants and photometric calibration of an image.

参考星：已知位置和/或星等的恒星，用于确定图片的底片常数和光度校准。

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Our aims are to study the oxygen abundance of the star-forming galaxies, to study the estimating methods and the calibration relations.

本论文主要研究了恒星形成星系的氧丰度，测量方法以及定标关系。

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As compared to polystyrene calibration curve, the migration trend of different number of arms of the star polymers was established.

对于分子量与淋洗体积曲线，星形PS- PI共聚物的臂数越多，向淋洗体积大的方向迁移得就越多；

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