luminous flux density [光] [电子] 光通量密度 ; 照度 ; 光度
low-luminous-density and low-resolution images 底照度低分辨率图像
density of luminous flux 光通量密度
Photometric and colorimetric measurement,such as luminous flux measurement of all kinds of lamps,luminous density measurement in classrooms and color measure of color TV etc. are commonly used in daily manufacturing.
在日常的生产中，光度和色度的测量是很常见的，如各种灯的光通量测量，教室内照度测量，彩色电视机的颜色测量等等。
参考来源 - 便携式多用途光色测量仪的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The interface of the sofyware is menu - styled. the components that deal with color and luminous density measurement, including standard input, system calibration, are emphasized.
整个软体是菜单式的，重点介绍了色品坐标和亮度测量的软体， 包括标准输入、系统定标和测量子程序。
If the expansion of the universe is to stop there must be enough invisible matter in the universe to exceed the luminous matter in density by a factor of roughly 70.
如果要让宇宙停止扩大，那就必须要有超过可见物质密度约70倍的不可见物质存在。
If the expansion of the universe is to stop, there must be enough invisible matter in the universe to exceed the luminous matter in density by a factor of roughly 70.
要使宇宙停止扩张，必须要有足够的不可见物质，远远超过发光物质，其密度大约是70倍。
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