流明光通量单位

例句：

1. 1.The sun is luminous in the morning.
   太阳在早上是发光的。
2. 2. The diamond is luminous under the light.
   钻石在灯光下闪闪发光。
3. 3. The painting is luminous with color.
   这幅画色彩斑斓，非常光亮。