使用核心库之外的其他库的应用程序仍然可以实现兼容性，但需要进一步执行回归测试。

An application that USES libraries outside of the core set might still maintain compatibility, but further regression testing should be done.

youdao

不过，每个发行版本对核心的定义会稍有不同，这就意味着当宣称您的应用程序支持某个给定的发行版本上时，总是需要进行回归测试。

However, each distribution's definition of core could vary slightly, which means that regression testing is always necessary when claiming your application is supported on a given distribution.

youdao

如果你看一下那些测试程序，你会发现它们都是一些针对核心方法的基本测试，主要包括像String

Rubinius was only faster in 2 of 11, and actually error or timeout on 4. If you look at those benchmarks, you’ll see that they are basically tests of a few core methods, mainly things like String#<<.

youdao