其中包括：当土壤正在变干之时，凭颜色发出警告的花盆；用水笔代替粉笔写字，用热脉冲可以擦除字迹的黑板；甚至包括在雨中变化颜色的汽车。

Among them: flowerpots whose color warns when the soil is drying out, blackboards using water instead of chalk that could be erased by a pulse of heat, and even cars that change color in the rain.

youdao

其中包括：当土壤正在变干之时，凭颜色发出警告的花盆；用水笔代替粉笔写字，用热脉冲可以擦除字迹的黑板；甚至包括在雨中变化颜色的汽车。

Among them: flowerpots whose color warns when the soil is drying out, blackboards using water instead of chalk that could be erased by a pulse of heat, and even cars that change color in the rain.

youdao