If you will add new material using new button in Materials properties panel you will see node tree in the node editor window.

如果你通过材质属性面板新按钮添加新的材质，将会在节点编辑窗口中看到节点树。

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You have to simply use Add button in Node editor to choose what you really want and to make your materials more realistic.

你须通过节点编辑器里的添加按钮操作来选择你真正想要的，这样你的材质看上去更真实。

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Left bottom window is the Node editor - a place where you can make all your materials.

窗口左底部是节点编辑器——这里你可以制作你所有的渲染材料。

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