假如操作系统和应用程序代码以及常量数据在VMs之间相同，那么这个特点就很有用。
This makes sense, given that operating system and application code and constant data are identical among VMs.
大多C/C++编译器会把遇到的全局常量数据移到一个相当于ROM的指定的数据段中。
Most C/C++ compilers place all of the constant global data they encounter into a special data segment that is recognizable to the locator as ROM-able.
如果您认为自己的查询总是使用相同的常量值过滤数据，那么您可能选择在MQT中包含一些过滤器谓词。
You may choose to include some of the filter predicates in MQTs if you think that your queries would always filter data using the same constant value.
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