By changing the structure of such a crystal slightly, using an electric charge, the colour of the light reflected by that crystal will change too.

依靠轻微得改变晶体的结构，利用电流的改变，当晶体改变时，光的颜色也会相应改变。

youdao

This paper explains the image expansion and confusion of the red and blue primary colours caused by the electric charge accumulation on the oil film in the colour TV light valve tube.

本文对油膜光阀管中电荷积累现象引起的图象扩大和红、蓝原色不能正确显示的原因进行了解释。

youdao

Each bead is doped with a mixture of chemicals that become electrically charged in response to odour molecules and that charge alters the colour of the dye.

ECONOMIST: Wine-tasting will never be the same again

At this stage, however, using the protein that way could turn reading into a truly electrifying experience: a charge of about 4, 000 volts is needed to trigger the colour change.

ECONOMIST: Showing off