如果您通过严格限制改变来隔离变化的发生，那么您为错误的发生制造了更小的空间，需要测试的地方也就更少。
If you isolate the places where changes occur by severely restricting mutation, you create a much smaller space for errors to occur and have fewer places to test.
但是我们应该承认，有一些变化，例如关系到系统质量，如实现性和可靠性，是不能用这个方法隔离的。
However, it should be acknowledged that some changes, such as those relating to system qualities such as performance or reliability, cannot be isolated in this way.
虽然示例中使用的资源适配器不响应J2EE事务性隔离级别设置的变化，但是某些围绕关系数据库系统构建的EIS确实可能会受到影响。
Although resource adapters used in the example do not respond to changes in J2EE transactional isolation level Settings, some EISs built around relational database systems may be affected.
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