The whole point of authentication is for the user to prove his or her identity.
身份验证的目的是要用户证明其身份。
Smaller programs will use either the system tree or the user tree, but not both.
小型程序会使用系统树或者用户树，但是不会同时使用这两者。
The user interface is typically not available, or it is unstable to use.
那就是得不到用户界面，或者它使用起来很不稳定。
It will allow the user to enter one or more search terms.
此应用程序允许用户输入一个或多个搜索条件。
Show an error message if the user id or password is invalid.
如果用户ID或者密码无效则显示一条出错信息。
Once the user decides which stock to buy, he or she places a buy order.
一旦用户决定要买哪种股票，他或她就会下购买订单。
The kernel or user space via some system event.
内核或用户空间，通过执行某些系统事件发出信号。
A single person or a team could perform the user role.
一个人或一个团队可能担任一个用户角色。
The model presented to the user may be very simple or very complex.
呈现给用户的模型可能非常简单，也可能非常复杂。
The cool thing here is that the user, whether human or machine, has no idea.
最棒的一点是，用户(无论人还是机器)都毫不知情。
The type of user can either be a user or a role.
用户类型可以是用户或角色。
Making the user wait five or ten seconds would be bad.
要让用户再等五或十秒是不行的。
First, find out whether or not the problem is specific to a single user.
首先，找出问题是否特定于某个用户。
Specify - Precisely define access to the user or group.
specify——精确地定义用户或组的访问权。
The subject is simply the task or action that the user wants to perform.
subject只是用户希望执行的任务或活动。
Check that the host or user is not being denied in /etc/ftpaccess.ctl.
确认在 /etc/ftpaccess.ctl 中没有拒绝这个主机或用户。
You can often filter the information by user, host, or tty if you need to.
通常，如果需要的话，您可以通过用户、主机或者tty对信息进行筛选。
In this mode, the user cannot see or enter data in the output message.
在此模式下，用户无法在输出消息中查看或输入数据。
They provide the user with methods that set and/or get member data.
这些类将为用户提供设置和（或）获取成员数据的方法。
That data could come from the user or from a database.
这个数据可以来自用户也可以来自数据库。
The user can skip or go ahead and publish the message.
用户可以跳过或者继续前进并发布消息。
The use case is always described from the actor (or user) perspective.
用例总是以参与者(或用户)透视图被描述。
At the top is the user, or application, space.
最上面是用户(或应用程序)空间。
The process continues until the user is authorized or access is denied.
这个过程一直进行，直到用户得到授权或者拒绝访问。
If the user is willing to wait, he or she may get a better price.
如果用户愿意等待，他(或她)可能得到更好的价格。
A page will appear asking the user to confirm or cancel the deletion.
将会出现一个页面，询问用户确认或取消删除。
The security plug-in returns a success or failure message to the user.
安全插件把成功或者失败的消息返回给用户。
The user might search, or see what's in his or her cart.
用户会进行搜索，或看看购物车里有什么。
The user might search, or see what's in his or her cart.
用户会进行搜索，或看看购物车里有什么。
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