intensity function

例句：

1. 1. The intensity of the lightis measured in lux.
   光的强度用勒克斯来衡量。
2. 2. The intensity of thesignal can be adjusted by changing the gain.
   信号的强度可以通过改变增益来调整。
3. 3.The intensity of the color changes with theamount of light.
   颜色的强度随着光线的多少而变化。