The best example is certainly when an exception occurs.
当然最好的例子是当一个异常发生时。
Exception Assistant that provides more information when an exception occurs.
异常助手功能，此功能可在发生异常时提供更多信息。
It is used to handle exceptions and to specify a view to render when an exception occurs.
它可以捕获异常，并且在异常发生时指定一个视图进行输出。
When an exception occurs, execution stops and control is given to the closest exception handler.
当例外状况发生时，执行会停止，而控制权会交给最接近的例外处理常式。
The debugger breaks execution of the program when execution reaches a breakpoint or when an exception occurs.
当执行到达一个断点或发生异常，调试器将中断程序的执行。
Other actions associated with the milestone may take place during normal operations, and not only when an exception occurs.
与此里程碑关联的其他动作可能在正常运营期间发生，而并不只是出现在发生异常时。
When an exception occurs, you might have to examine code inside a system call to determine the cause of the exception.
发生异常时，您可能需要检查系统调用内部的代码，以确定该异常的起因。
When an exception occurs, it may have an associated value, also known as the exception's argument. The presence and type of the argument depend on the exception type.
发生异常时，可能会有一个附属值，作为异常的参数存在。这个参数是否存在、是什么类型，依赖于异常的类型。
The Add Records with Failure menu item in the transaction demo application demonstrates what happens to a transaction when an exception occurs sometime during the operation.
TransactionDemo应用程序中的AddRecordswithFailure菜单项演示了当操作过程中发生异常时事务将如何处理。
V8 will throw an exception if an error occurs - for example, when a script or function attempts to read a property that does not exist, or if a function is called that is not a function.
当错误发生时，v8会抛出一个异常。比如，当一个脚本或者函数试图去访问一个并不存在的属性，或者调用一个并不是函数的函数。
An exception handler is a kind of action handler, which is invoked when exception occurs during the node execution.
异常处理器也是一种action处理器，当节点执行时出现异常，它将会被调用。
When an error or exception occurs in your application, FFDC ensures that it is dealt with in the correct way, and that any useful information about the error is preserved.
当你的应用程序发生一个错误或者抛出一个异常时，FFDC可以确保这个错误或者异常被正确的处理，并且任何和这个错误相关的信息都将会被保存下来。
When a timeout occurs during the processing of a service request or response message, it is considered an exception and some measure must be taken to deal with the exception.
在处理服务请求或相应消息的过程中出现超时的时候，超时将被视为异常，必须采取某些措施来处理异常。
When a system exception occurs at the target component during an asynchronous invocation, the message is rolled back to the incoming destination and redelivered.
在异步调用过程中，当目标组件发生系统异常时，消息会回滚到传入目的地，并被重新提交。
An activity can stop when an unexpected a "and therefore unhandled a" exception occurs.
某个活动可能在发生意外异常时而停止(因此不会处理该活动)。
There were two options for what should happen when the retrieval timeout occurs: return null or throw an exception.
对于在检索超时发生时应当发生的事情，有两个选择：返回null或者引发异常。
Occurs when an exception is thrown in managed code, before the runtime searches the call stack for an exception handler in the application domain.
当托管代码抛出异常时发生，在运行时在调用堆栈中搜索应用程序域中的异常处理程序之前。
A variable that holds the error message in case an exception occurs when getting the forecast data.
保存错误消息的变量，以防在获取预测数据时发生异常。
The exception that is thrown when an error occurs during execution of an SQL command.
执行SQL 命令却发生错误时，所掷回的例外状况。
An exception is thrown by code when a problem occurs, and it is passed up the stack until the application handles it or the program fails.
异常在出现问题时由代码引发，并在堆栈中向上传递，直到应用程序对其进行处理或者程序失败。
Occurs when the application encounters an unhandled exception.
当应用程序遇到未经处理的异常时发生。
The exception that is thrown when an error occurs during the commit, rollback, or uninstall phase of an installation.
在安装的提交、回滚或卸载阶段发生错误时引发的异常。
The exception that is thrown when an error occurs while processing an XSLT transformation.
处理XSLT转换而发生错误时引发的异常。
Cleanup occurs even when an exception is raised by the protected code.
即使受保护的代码引发异常，也进行清理。
Occurs when the background operation has completed, has been canceled, or has raised an exception.
当背景作业已完成、取消或引发例外状况时发生。
Occurs when an exception is raised in a command.
在命令中引发异常时发生。
Occurs when an exception is raised in a command.
在命令中引发异常时发生。
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