工程师们在选用其他颜色是采用了反复试验、不断摸索的方法。
Engineers used the trial and error method in selecting the other colors.
为了配合当前的艺术时尚，俞彬在研究烙画的过程中不断对它进行改良，比如在烙画时的染色上，他就摸索出了自己的一套方法。
In line with current fashion art, Shubin pyrograph study in the process of constantly improving it, such as when pyrograph in the dyeing, he found his own set of methods.
为了配合当前的艺术时尚，俞彬在研究烙画的过程中不断对它进行改良，比如在烙画时的染色上，他就摸索出了自己的一套方法。
In line with current fashion art, Shubin pyrograph study in the process of constantly improving it, such as when pyrograph in the dyeing, he found his own set of methods.
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