luminous flux curve of standard lamp

例句：

1. 1. The luminous flux curve of the standard lamp is used to measure the intensity of light.
   标准灯的光度流曲线用于测量光的强度。
2. 2. The luminous flux curve of the sun shows that its energy is increasing.
   太阳的光度流曲线显示其能量正在增加。
3. 3. The luminous flux curve of the moon is used to study its phases and movements.
   月亮的光度流曲线被用来研究其相位和运动。