He will like build up an image, like over layers. OK, so he'll have ten layers built on a canvas.

他擅于在图层上构建图形。他可能会在画布上构建十个图层。

Then those fine grained layers built up by sedimentation, that could have taken centuries.

接着那些细颗粒层便因为沉积作用而开始形成，这需要经历几个世纪。