Once a voltage is passed through, the oily regions deflect the colored substances surrounding bare regions, which gives rise to a negative ridge pattern, similar to the VMD method.

一旦电压通过，油性区域会使裸露区域周围的有色物质发生偏转，从而产生一个负脊纹图案，类似于 VMD 方法。

When you have a cake, you usually put a thick colored substance made of butter or some other substance as decoration on top of the cake.

做蛋糕的时候，通常会在蛋糕上面放上一层颜色很浓的黄油或其他物质作为装饰。