Although estimates vary widely, perhaps some 12 million undocumented immigrants live in the United States.

VOA: standard.2009.09.01

And so my individual paper and my presentation was more on public universities and how they should respond to undocumented immigrants, and specifically whether they should offer them in-state tuition.

所以我的论文和报告,主要谈论的就是公立大学,如何对待那些无记录的移民，尤其是，他们是否,能够只付州内学费。

普林斯顿公开课 - 人性课程节选

Latinos in particular fear that they will be racially targeted by police on the basis of their appearance, and said it will make undocumented immigrants reluctant to report crimes or cooperate in police investigations.

VOA: standard.2010.04.28

The Pew Hispanic Center says more than half of Mexican immigrants are undocumented.

VOA: special.2009.04.18