Error, notification (alert), and confirmation messages are blocking bulletin dialogs. As we shall see, even these can and should be avoided in most circumstances.
错误、通知(警告)和确认消息都是阻塞型公告对话框，我们将看到在大多数情况下就算是这些也都能够避免，并且应该避免。
An alert notifies a user of the program's action, whereas a confirmation also gives a user the authority to override that action.
警告通知用户程序的行为，而确认给用户赋予一种忽略该行为的权力。
An alert notifies a user of the program's action, whereas a confirmation also gives a user the authority to override that action.
警告通知用户程序的行为，而确认给用户赋予一种忽略该行为的权力。
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