Now you know that when an error occurs, the application must clearly and succinctly explain to the user what went wrong, where the error occurred, and how to fix it.
现在您了解了错误是在什么时候发生的，应用程序必须明确而简洁地为用户解释出错原因、出错位置以及改正方法。
You know only what any user has to do to use the service and what any provider must do when implementing it.
您只是知道有些用户将会使用服务，以及提供商在执行服务时必须使用它。
Unfortunately, it won't work as a filter because it does not know how to handle the arguments that a CUPS filter must handle, namely, job id, user, job title, number of copies, and job options.
不幸的是，它不能作为过滤器工作，因为它不知道如何处理CUPS过滤器必须处理的参数：作业id、用户、作业标题、拷贝数量和作业选项。
You must know the IP address of your tablet and have the SSH server up and running. The other requirement is that you need to connect as user when prompted by the target site.
您必须知道tablet的IP地址而且已经设置和运行了SSH服务器。
Before knowing if a user is authorized to do a particular operation, DB2 must be able to know the effective database authorization ID of the external user, and in which groups that user belongs.
在获知用户是否被授权进行特定操作之前，DB 2必须能够获知外部用户的有效数据库授权ID及其所属的组。
When a user triggers certain Ajax actions, your application must give an immediate visual cue to provide feedback to users so that they know that they actually clicked the mouse at the proper spot.
用户触发某个Ajax动作后，应用程序必须立刻给出直观的线索向用户反馈，以便他们知道是否点对了地方。
User agents must also know the specific character encoding that was used to transform the document character stream into a byte stream.
用户代理必须还要知道将文档字符流转换成字节流所使用的字符编码。
User agents must also know the specific character encoding that was used to transform the document character stream into a byte stream.
用户代理必须还要知道将文档字符流转换成字节流所使用的字符编码。
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