FSI开放式英语学习网，fsi-language-courses.org教育网页上有各种主流语言的学习教程
FSI-Language-Courses开放式英语教程的主导思想是不断地重复重复再重复
These courses were developed by the United States government and are in the public domain.
This site is dedicated to making these language courses freely available in an electronic format. This site is not affiliated in any way with any government entity; it is an independent, non-profit effort to foster the learning of worldwide languages. Courses here are made available through the private efforts of individuals who are donating their time and resources to provide quality materials for language learning.FSI英语
