But you can do things like cups, for example, and so, if you add a little bit of gold, if you add a little bit of semiconductors you could do sensors that stick on the surfaces of foods.
但是你也能制做像杯子一类的东西，打个比方 而且，如果你加点金粉，如果你加点半导体 你就做成了覆盖在事物表面的传感器