会员身份证号是会员唯一不变的标识。

Member ID number is the only constant member identification.

当然！请在这里填入你的身份证号和联系方式。

Sure! Please just fill in your I.D. number and ways to contact you here.

也许最显著的是，当局正在商讨要求微博博主注册账号时，不能像现在广泛使用的匿名注册，而必须用自己的真实姓名和身份证号。

Perhaps most telling, the authorities are discussing requiring microbloggers to register accounts with their real names and identification numbers instead of the anonymous handles now in wide use.