photochromy

例句：

1. 1.The color of the fabric changes with the light.
   这种布料的颜色随光线变化而改变。
2. 2.Photochromy is a fascinating phenomenon that occurs when light interacts with certain molecules.
   光致色变是一种有趣的现象，当光线与某些分子相互作用时会发生。
3. 3. In this experiment, we observed the photochromy of a dyed cloth under different lighting conditions.
   在这个实验中，我们观察了染色布在不同照明条件下的光致色变。