查询构件的值可能会引起预料之外的效果，因为如果捆绑值没有遵循规范的JSF生命周期的话，那么它就会受到评价。
Querying components values might have unexpected side effects, because the value binding would be evaluated when it wouldn't be by the regular JSF life cycle.
可以使用工具、报告和查询来评价模型的状态，并追踪访问入侵情况。
Metrics, reports, and queries can be used to assess the state of the models, as well as to track access violations.
现在我们来看看在评价和使用这些特性时关键的考虑角度：性能，尤其是通常的数据仓库业务的用户查询的性能。
We now turn to the first key consideration in evaluating and using these features: performance, specifically, performance of typical warehouse business user queries. These queries tend to.
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