如果尚未设置这些配置变量，那么就使用JVM的缺省语言环境，该缺省语言环境是从jsp容器所运行的操作系统中获取的。
If these configuration variables have not been set, then the JVM's default locale is used, which is obtained from the operating system the JSP container is running on.
而形式化约束语言可以对此做到有效补充，它可以帮助测试人员充分理解被测系统，进而提高测试用例的获取率以及测试覆盖率。
Whereas the formal constraint language serve as an effective complement and help testers understand the system test, and then further improve the test access rate and coverage rate of test-case.
就是说获取的应该是操作系统的设置语言。
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