She must have that caller ID thing.

她一定有那个来电显示的东西。

And while the computer generates a random number to call, its also generating a false number to show up on your caller ID disguising its identity.

当计算机产生一个随机号码来拨打时，它也会产生一个虚假的号码来显示在你的来电显示上，掩饰它的身份。

Caller ID allows you to see the phone number of the person calling unless they have caller ID blocking, which means they don't let you see their number.

来电显示允许您查看来电者的电话号码，除非他们有来电显示阻止，这意味着他们不会让您看到他们的号码。