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| 21. | eliminates the chance that a user will make an invalid entry (because no musician wants to be stopped by |
| 这种有界的特性同时也向用户表明了使用情境，要输入的值必须在允许的范围内，从而消除了用户可能输入非法数值的可能（因为没有音乐人会喜欢错误对话框阻止其工作）。 |
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| 22. | The user can choose to allow or not allow applications to show the Encoder Configuration Dialog Box by |
| 用户可以选择下列适当的选项，决定允许或禁止应用程序显示编码器配置对话框。 |
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| 23. | the proper step to take here is to offer users a choice, but this means that they will be bothered by |
| 可能有人会认为，这里合适的做法是为用户提供选择，但这意味着用户可能在80%的情况被不必要的对话框打搅。 |
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| 24. | has been defined for your database, you can prevent users from changing the settings in the Startup dialog |
| 如果数据库中已定义了用户级安全机制?，则只要确保不准许用户具有数据库管理员权限，就可以阻止用户更改“启动”对话框中的设置。 |
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