The process of forming a 3-D figure from a 2-D surface is called extrusion.

从 2-D 平面形成 3-D 图形的过程称作挤压。

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The coordinate system, for 2-d graphics, is shown in Figure 2.

2 - D图形的坐标系如图2所示。

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So, for example, if we needed to figure out the electron configuration for titanium, 4s2 it would just be argon then 4 s 2, 3d2 and then we would fill in the 3 d 2.

所以举个例子,如果我们需要解出钛的电子构型，它会是Ar然后，然后我们填充。

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