一位用户可以注册多个email地址。

An user can register multiple email address.

youdao

客户还坚信认证必须用数据库进行，以便日后新用户可以注册并立即登录。

Your client is also a firm believer that authentication must be done using a database so that new users can later register and immediately log in.

youdao

数据库服务器管理员(DBSA)可以使用新的内置角色EXTEND指定哪些用户可以注册包含EXTERNAL name子句的UDR。

The Database Server Administrator (DBSA) can use a new built-in role, called EXTEND, to specify which users can register UDRs that include the EXTERNAL NAME clause.

youdao

So what you'll see in problem set 0 or problem set 1 is that you'll soon have access to what we call the CS50 cloud which is a bunch of servers that live on campus and on which you will all have a username and password.

所以你在习题集0或习题集1上看到的,访问“CS50云“,就是一些校园服务器,你可以注册一个用户名和密码。

哈佛公开课 - 计算机科学课程节选