Can users register to create their own user names, or are the names based on users' E-mail addresses or some other potentially well-known construct (first letter of first name plus last name)?

用户是否可以注册，以创建自己的用户名，或者名称基于用户的电子邮件地址或其他可能已知的构造(名的第一个字母加上姓)？

youdao

With Yahoo! Mail, you upgrade to Yahoo mail Plus to get POP access, then use your preferred E-mail client to download all your mail, then backup.

邮件，要升级为Yahoo Mail Plus才能获得POP存取权限，然后使用喜欢的电子邮件客户程序下载所有邮件，然后备份。

youdao

I sent an E-mail message to a friend telling him about Adblock Plus, an easy-to-use free addition to the Firefox Internet browser that deletes advertisements from Web sites.

我给我的朋友发了一封电子邮件，告诉他firefox浏览器推出了一个免费的Adblock plus(广告拦截插件)，这个插件可以清除网络上的广告。

youdao

To be sure, it includes hundreds of pages and a legion of details on how research was conducted, plus potentially damaging e-mail exchanges among analysts and investment bankers.

FORBES: Magazine Article

The two 50-minute online test sessions assessed "the old spreadsheet, word-processing and presentation applications which I was teaching 15 years ago, plus a bit of e-mail".

BBC: NEWS | UK | Education | School test 'should be optional'

It will give users of midsize, economy, and luxury GM cars and trucks voice access to e-mail, plus information retrieval from the Web.

CNN: E-cars take to the streets