To do this, the client of the process invokes the cancellation operation that is implemented using an event handler.
为此，流程的客户机将调用使用事件处理程序实现的取消操作。
If your application has a button to cancel a long-running operation but you're doing work in the UI thread, the cancellation event won't be delivered until after the operation has finished!
如果应用程序有一个按钮用于取消某个长时间运行的操作，而您正在使用UI线程执行操作，那么这个取消事件只有到UI线程所做的操作完成后才会被处理！
An invocation of an operation provided by a process: For example, a claims handling process supports the cancellation of a claim while the process is currently running.
对流程提供的操作的调用：例如，声明处理流程支持在流程当前正在运行时取消声明。
Basic operation rules have been established, including addition, positive scalar multiplication, cancellation law for addition and so on.
基本的运算法则已经形成，包括加法运算、数乘运算、加法的消去律等。
Basic operation rules have been established, including addition, positive scalar multiplication, cancellation law for addition and so on.
基本的运算法则已经形成，包括加法运算、数乘运算、加法的消去律等。
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