It cited statistics from the student and Exchange Visitor Program, a Department of Homeland Security unit that tracks foreigners in the US on student visas and the schools they attend.

数据援引自国土安全部中负责中学生和交流访问者项目的一个部门，这个项目跟踪外国人在美国的学生签证和学习学校的统计数据。

youdao

Imagine how impressed your friends when you're the only one who can speak to the new foreign exchange student or visitor in town.

想象一下如果你是本城唯一可以和外国交流学生或是参观者用英语交流的人，你的朋友该对你有多刮目相看啊。

youdao

This file defines four roles: manager, librarian, student, and visitor.

这个文件定义4个角色：manager、librarian、student和visitor。

youdao

Yet student visitor visas aren't included - and growing abuse in that category is being ignored.

BBC: Yvette Cooper: End student visitor visa loopholes

"Student visitor visas have fewer checks than full student visas and are therefore ripe for exploitation by those looking to avoid tougher checks, " he added.

BBC: Student visas: UKBA 'failed to check' tip-offs

Stronger checks are needed on shorter-term student visitor visas.

BBC: Yvette Cooper: End student visitor visa loopholes