因为指甲是一种有生命的物质,所以便具有相应的结构。
That is why we take the living material around us as subject matter for education.所以我们要把自己周围活生生的事物作为教材。
But instead of just putting down ink on paper, they stack up layers of living material to make 3-d shapes.但和在纸上喷墨不同,他们将层层活性物质累积从而制造一个3d物体。