Data binding allows you to map specific component values to an existing data structure, without the need for extra programming.
通过数据绑定可以将特定的组件值映射为一个已有的数据结构，而不必进行额外的编程。
Because validation occurs before the component values are bound to the model (in the update model values phase), the model is in an unknown state.
由于验证发生在组件值绑定到模型之前(在更新模型值阶段)，所以模型处于未知状态。
The component values will have been converted, validated, and applied to the model objects, so you can now use them to execute the application's business logic.
组件值已经经过了类型转换和有效性验证，并被应用到模型对象中了，因此您现在可以使用它们来执行应用程序的业务逻辑了。
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