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.
为这些卡片给出合适的估算大小也很困难：例如更新一台服务器上的应用程序库时会不会影响到看似不相干的领域？
And giving these stories sizes was difficult to say the least, since estimation is often difficult - will updating a lib on a server affect other seemingly unrelated areas?
这些提高来自于不同的程序库、处理器特性以及得到更新的编译器。
These gains come about because of different libraries, processor features, and updated compilers.
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