为了让用户(和程序员)不必追踪程序库版本号和更新，系统提供了大量的符号链接。

To prevent users (and programmers) from needing to track library Numbers and updates, the system comes with a large number of symbolic links. In general, the pattern is that.

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添加程序库的符号表。

Attaching the library's symbol table.

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链接器将所有对符号的引用进行分类，标识出它们是在哪个程序库中找到的。

The linker sorts through references to symbols, making notes about in which libraries they were found.

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