The principle is based on the reversibility of a photochemical reaction accompanied by a change of coloration.

其原理是根据伴随着染色变化在光化反应中的可逆性。

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The principle is based on the reversibility of a photochemical reaction accompanied by a change of coloration.

其原理是根据伴随着染色变化在光化反应中的可逆性。

youdao