But da Vinci did not change his mind half way through, he said. On top of the base layers the artist added a glazed shadowing layer to create a three dimensional effect.

他称，但达芬奇没有中途改变主意，之后，他在底层上添加了一层釉料阴影层来制造三维效果。

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Began to create a base trunk. Then I added another layer of main brunches to give some variations for the main spine of the tree.

开始我创建一个树干作为基础，然后叠加了另一个主枝干图层，使树的主干发生一些变化。

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Create new layers and constantly merge them with the base layer to keep things under control.

建立一个新层，并经常和基本层合并，始终保持项目在控制之中。

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Its properties are so useful and unusual that it is used not only to create the base layer of skis, but also to make bulletproof jackets and artificial hip and knee joints.

ECONOMIST: Using ski wax can trap dirt, and thus slow down the skier