“grease spot photometer”的概念、定义、翻译、参考文献-科学参考

单词	grease spot photometer
释义	grease spot photometer [`grēs ´spät fǝ`täm·ǝdǝr] ^OPTICS A photometer in which the light sources whose intensities are to be compared illuminate a thin sheet of opaque paper with a translucent spot at the center.
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