The smart bit is that the tubes' conductivity is affected by cracks in, or corrosion of, the painted surface.

之所以说它智能，是因为若涂层表面出现裂缝或被腐蚀，碳纳米管的导电性就会改变。

So the rust that's coming down... is coming from the unpainted surface, but the actual painted surface is still fine.

所以铁锈来自未上漆的表面，但实际上上漆的表面仍然很好。

For instance, while Pollock's process resulted in radically flat painted surfaces, the web of painted lines can create the illusion of an infinite layered depth when examined up close.

比如，波洛克的作法带来了对比强烈的平面，线条交织的网格 仔细看的话能让人产生无限分层的深度的错觉。