在w3 profile数据库中大约有200,000个唯一的用户ID。

We have approximately 200,000 unique user IDs in the w3 profile database.

youdao

例如，主键可以是一个唯一的用户ID、一个股票符号，在我们的实例中，主键是一个邮政编码。

For example, the key could be a unique user ID, a stock symbol or, in our case, a zip (postal) code.

youdao

为了安全起见，需要在XC10上配置唯一的用户ID和密码，XI50使用它们来访问数据网格。

For security, a unique user id and password needs to be configured on the XC10, which will be used by the XI50 to access the data grid.

youdao

It was a complete waste of time, unless the goal in life was simply to pester the user for some input.

刚才的时间就完全浪费了，除非那个唯一的目的,是简单地纠缠用户索要一些输入。

哈佛公开课 - 计算机科学课程节选

It's defined in CS50's library; its sole purpose in life is to ask the user for a floating point value and return it.

它被定义在CS50的函数库中，它的唯一目的是,向用户询问一个浮点数的值，然后返回它。

哈佛公开课 - 计算机科学课程节选