另一种类型的段，称为bss段，它包含以符号数据开头的块。
Another type of section, known by the BSS designation, contains blocks started by symbol data.
符号聚类是对传统聚类的重要扩展，而区间数据是一类常见的符号数据。
Clustering for symbolic data is an important extension of conventional clustering, and interval representation for symbolic data is often used.
他们可以通过把语法树回馈给编译集来创建语义模型，从而用符号数据对其进行注解。
A semantic model is created by feeding a syntax tree back into the compilation so that it will be annotated with symbol data. The semantic model can then be queried for information such as.
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