自由永远不是绝对的，自由有它的边限，那就是规则。
Freedom has never been absolute freedom. Freedom has its limit which is called the rules.
在额外语义适用于函数时，由TSS 边限图示的使用来识别。
Where additional semantics apply to a function, the material is identified by use of the TSS margin legend.
在额外语义适用于函数时，由TSH 边限图示的使用来识别。
Where additional semantics apply to a function, the material is identified by use of the TSH margin legend.
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