Switch back to your assembly diagram and create a Selector component.
切换回组装关系图并创建一个选择器组件。
The destination of a selector can be a component inside the assembly diagram of the same module or an export of another module.
选择器的目标可以是相同模块的组装关系图中的组件，或另一个模块的导出。
A basic use of a selector is for simple dispatch, which means you can dynamically reroute the destination of a service call from one component or import to another.
选择器的基本用途是进行简单的分派，这意味着您可以将服务调用的目标从一个组件或导入动态地重新路由到或导入另一个组件。
The Selector component provides a selection mechanism for invoking components that have the same interface.
Selector组件为调用具有相同接口的组件提供一种选择机制。
Now, you can define the selector so that the service call gets routed to the correct component. In the next steps, you specify the selection criteria, which is the value of the applyDate variable
现在，您可以定义选择器，以便将服务调用路由到正确的组件。
In this section, you make the application more flexible by modifying the invoke activity of the business process so that it calls the selector, rather than a specific component.
在本部分中，通过修改业务流程的调用活动，可使您的应用程序更灵活，以便它可以调用选择器，而不是指定的组件。
A selector is a dispatch pattern you use to dynamically determine which implementation of a component to invoke at runtime.
选择器是一种分派模式，用于动态确定在运行时调用哪一个组件的实现。
In other words, a selector can dynamically re-route a service call to any other component at runtime.
换句话说，选择器在运行时可以将服务调用动态地重新路由到任何其他组件。
The selector uses applyDate to decide which component to run.
选择器使用 applyDate 来决定运行哪一个组件。
Although fault component current phase selector has excellent performance for single transmission lines, it may select unwanted phase for cross-country faults in double-circuit lines on a same tower.
相电流差突变量选相元件在单回线故障中具有良好的选相性能，但在同杆双回线跨线故障中可能误选相。
The fault phase selector discussed is based on the result that the fault component of sound phases is zero when a single-phase-to-ground fault occurs.
文中所探讨的相电流突变量选相元件，是利用单相接地故障时，两健全相相间电流突变量为零这一特征来得到的。
A novel fault phase selector by fault component of compensation voltage based on traveling wave is presented for high-speed protection.
针对传统电流突变量和电压突变量选相元件不能同时满足强弱电源系统侧保护要求的缺点，提出一种新的突变量选相原理。
A novel fault phase selector by fault component of compensation voltage based on traveling wave is presented for high-speed protection.
针对传统电流突变量和电压突变量选相元件不能同时满足强弱电源系统侧保护要求的缺点，提出一种新的突变量选相原理。
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