一般的CAD系统只能制作简单的填充符号模式。
Commercial CAD systems in general offer the simple filled patterns.
框架并不规定要填充的单元格的符号或顺序，因为这一知识点已经超出了参考结构目标的范围。
The framework does not dictate or prescribe a notation or an order in which cells are to be filled, as this knowledge lies beyond its goal of providing a reference structure.
不过，我们还希望填充一些元素名、元素符号、元素号和原子量，可以在模板中使用xbl： content元素来选择这些内容。
However, you also want to include the name, symbol, atomic number, and atomic weight; you can select each of these by using an XBL: content element in the template.
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