Void respond (RuntimeException, RequestCycle) is called whenever an uncaught exception occurs during the event handling or response phase so that an appropriate exception response can be generated.
只要在事件处理过程或响应阶段发生未被捕获的异常，voidrespond (RuntimeException,RequestCycle)都会被调用以便生成合适的异常响应。
Void respond (RuntimeException, RequestCycle) is called whenever an uncaught exception occurs during the event handling or response phase so that an appropriate exception response can be generated.
只要在事件处理过程或响应阶段发生未被捕获的异常，voidrespond (RuntimeException,RequestCycle)都会被调用以便生成合适的异常响应。
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