This lets your application gracefully exit validation, print error messages, or even to try to recover from the error and continue validating.
从而让应用程序从容地退出验证、打印错误消息，甚至可以尝试从错误中恢复并继续验证。
Cannot print: Error reading a registry value's contents.
无法打印：读取注册表值的内容出错。
Cannot print: Error reading a registry value's contents.
无法打印：读取注册表值的内容出错。
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