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)？

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)?

youdao

不要泄露你的出生日期，你母亲的娘家姓，宠物的名字活其他任何个人识别信息于那些社交媒体网站，例如Facebook LinkedIn or Twitter。

Don't divulge your birth date, mother's maiden name, pet's name or any other identifying information on social media websites such as Facebook, LinkedIn or Twitter.

youdao

除了一个姓梁的小女孩偶尔会和他一起玩阿龙没有其他的朋友。

He doesn't have any friends except a girl surnamed Liang who now seldom comes to play with him.

youdao