链接是静态代码，而状态符号(红色的X及绿色的对号)链接及项目主题必须动态呈现。

Links are static code, while the link for the status symbol (the red X and the green checkmark) and item subject must be rendered on-the-fly.

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转换图还包含 输入符号（在本例中为 XML 标记）和控制输入符号如何修改状态的 转换函数。

The transition diagram also includes input symbols (in this case XML tags) and a transition function that controls how input symbols modify the state.

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复杂系统的概率描述提供了一种状态序列的表示方法，涉及到一个包含符号和字母的符号系统。

The probabilistic description of complex systems offers a representation in terms of sequences of states that can be regarded as symbols, or letters of an alphabet.

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And so, if we look at our box notation, we've got three states in the p orbital.

因此，如果我们看看我们的盒子符号，在p轨道有三个状态。

麻省理工公开课 - 固态化学导论课程节选