shí / yàn / zhōng / jiā / rù / zhǐ / shì / jì / hòu / róng / yè / hěn / kuài / biàn / chéng / le / lán / sè

实验中加入指示剂后，溶液很快变成了蓝色。

After the indicator was added in the experiment, the solution quickly turned blue.